PROSPECTUS SUPPLEMENT

American Century Asset Allocation Portfolios, Inc.

ONE CHOICE PORTFOLIO(SM): VERY AGGRESSIVE * ONE CHOICE PORTFOLIO(SM): AGGRESSIVE
ONE CHOICE PORTFOLIO(SM): MODERATE * ONE CHOICE PORTFOLIO(SM): CONSERVATIVE
ONE CHOICE PORTFOLIO(SM): VERY CONSERVATIVE

Supplement dated August 3, 2007 * Prospectus dated December 1, 2006

American Century Mutual Funds, Inc.

NEW OPPORTUNITIES FUND * VEEDOT FUND

Supplement dated August 3, 2007 * Prospectuses dated March 1, 2007

American Century Strategic Asset Allocations, Inc.

NEWTON FUND

Supplement dated August 3, 2007 * Prospectus dated April 1, 2007

American Century World Mutual Funds, Inc.

INTERNATIONAL OPPORTUNITIES FUND * INTERNATIONAL STOCK FUND

Supplement dated August 3, 2007 * Prospectuses dated April 1, 2007

THE FOLLOWING REPLACES THE PARAGRAPH BEGINNING "CERTAIN FINANCIAL
INTERMEDIARIES" UNDER THE INVESTING THROUGH A FINANCIAL INTERMEDIARY SECTION OF
THE PROSPECTUS.

Certain financial intermediaries perform recordkeeping and administrative
services for their clients that would otherwise be performed by American
Century's transfer agent. In some circumstances, the advisor will pay such
service providers a fee for performing those services. Also, the advisor and the
fund's distributor may make payments to intermediaries for various additional
services, other expenses and/or the intermediaries' distribution of the fund out
of their profits or other available sources. Such payments may be made for one
or more of the following: (1) distribution, which may include expenses incurred
by intermediaries for their sales activities with respect to the fund, such as
preparing, printing and distributing sales literature and advertising materials
and compensating registered representatives or other employees of such financial
intermediaries for their sales activities, as well as the opportunity for the
fund to be made available by such intermediaries; (2) shareholder services, such
as providing individual and custom investment advisory services to clients of
the financial intermediaries; and (3) marketing and promotional services,
including business planning assistance, educating personnel about the fund, and
sponsorship of sales meetings, which may include covering costs of providing
speakers, meals and other entertainment. The distributor may sponsor seminars
and conferences designed to educate intermediaries about the fund and may cover
the expenses associated with attendance at such meetings, including travel
costs. These payments and activities are intended to provide an incentive to
intermediaries to sell the fund by educating them about the fund and helping
defray the costs associated with offering the fund. The amount of any payments
described by this paragraph is determined by the advisor or the distributor, and
all such amounts are paid out of the available assets of the advisor and
distributor, and not by you or the fund. As a result, the total expense ratio of
the fund will not be affected by any such payments.

American Century Investment Services, Inc., Distributor

©2007 American Century Proprietary Holdings, Inc. All rights reserved.
The American Century Investments logo, American Century and American Century
Investments are service marks of American Century Proprietary Holdings, Inc.

SH-SPL-56306 0708












American Century World Mutual Funds, Inc.

PROSPECTUS SUPPLEMENT

TECHNOLOGY FUND

Supplement dated August 3, 2007 * Prospectus dated April 1, 2007

SPECIAL MEETING OF SHAREHOLDERS

At a Special Meeting of Shareholders held July 27, 2007, shareholders of the
fund approved the combination of Advisor Class shares into Investor Class
shares. This combination will be effective November 30, 2007.

Shareholders also approved a change to the Advisor Class fee structure. The
change will result in a decrease of 25 basis points (0.25%) in the Rule 12b-1
fee and a simultaneous increase of 25 basis points in the unified management
fee, resulting in no change to the total expense ratio of the class. The fee
changes will be effective on September 4, 2007.

THE FOLLOWING CHANGES ARE EFFECTIVE SEPTEMBER 4, 2007.

AS A RESULT OF THE CHANGE TO THE ADVISOR CLASS FEE STRUCTURE, THE FOLLOWING
REPLACES THE ANNUAL FUND OPERATING EXPENSES TABLE ON PAGE 6 OF THE PROSPECTUS.

ANNUAL FUND OPERATING EXPENSES (EXPENSES THAT ARE DEDUCTED FROM FUND ASSETS)
                             DISTRIBUTION AND                TOTAL ANNUAL
                 MANAGEMENT  SERVICE (12B-1)    OTHER        FUND OPERATING
                 FEE(1)      FEES(2)            EXPENSES(3)  EXPENSES
----------------------------------------------------------------------------
Investor Class   1.50%       None               0.01%        1.51%
----------------------------------------------------------------------------
Institutional
Class            1.30%       None               0.01%        1.31%
----------------------------------------------------------------------------
Advisor Class    1.50%(4)    0.25%(5)           0.01%        1.76%
----------------------------------------------------------------------------

(1)  THE FUND PAYS THE ADVISOR A SINGLE, UNIFIED MANAGEMENT FEE FOR
     ARRANGING ALL SERVICES NECESSARY FOR THE FUND TO OPERATE. THE FEE SHOWN IS
     BASED ON ASSETS DURING THE FUND'S MOST RECENT FISCAL YEAR. THE FUND HAS A
     STEPPED FEE SCHEDULE. AS A RESULT, THE FUND'S UNIFIED MANAGEMENT FEE RATE
     GENERALLY DECREASES AS STRATEGY ASSETS INCREASE AND INCREASES AS STRATEGY
     ASSETS DECREASE. FOR MORE INFORMATION ABOUT THE UNIFIED MANAGEMENT FEE,
     INCLUDING AN EXPLANATION OF STRATEGY ASSETS, SEE The Investment Advisor
     UNDER Management.

(2)  THE 12B-1 FEE IS DESIGNED TO PERMIT INVESTORS TO PURCHASE SHARES
     THROUGH BROKER-DEALERS, BANKS, INSURANCE COMPANIES AND OTHER FINANCIAL
     INTERMEDIARIES. THE FEE MAY BE USED TO COMPENSATE SUCH FINANCIAL
     INTERMEDIARIES FOR DISTRIBUTION AND OTHER SHAREHOLDER SERVICES. FOR MORE
     INFORMATION, SEE Multiple Class Information AND Service, Distribution and
     Administrative Fees, PAGE 24.

(3)  OTHER EXPENSES INCLUDE THE FEES AND EXPENSES OF THE FUND'S INDEPENDENT
     DIRECTORS AND THEIR LEGAL COUNSEL, AS WELL AS INTEREST.

(4)  THE UNIFIED MANAGEMENT FEE HAS BEEN RESTATED TO REFLECT THE INCREASE IN THE
     FEE APPROVED BY THE FUND'S SHAREHOLDERS EFFECTIVE SEPTEMBER 4, 2007.

(5)  THE 12B-1 FEE HAS BEEN RESTATED TO REFLECT THE DECREASE IN THE FEE
     EFFECTIVE SEPTEMBER 4, 2007.

THE FOLLOWING REPLACES THE FIRST PARAGRAPH OF THE SERVICE, DISTRIBUTION AND
ADMINISTRATIVE FEES SECTION ON PAGE 24 OF THE PROSPECTUS.

Service, Distribution and Administrative Fees

Investment Company Act Rule 12b-1 permits mutual funds that adopt a written plan
to pay certain expenses associated with the distribution of their shares out of
fund assets. The Advisor Class offered by this prospectus has a 12b-1 plan.
Under the Advisor Class Plan, the fund's Advisor Class pays the distributor an
annual fee of 0.25% of Advisor Class average net assets, for distribution and
individual shareholder services, including past distribution services. The
distributor pays all or a portion of such fees to the financial intermediaries
that make Advisor Class shares available. Because these fees may be used to pay
for services that are not related to prospective sales of the fund, the Advisor
Class will continue to make payments under its plan even if it is closed to new
investors. Because these fees are paid out of the fund's assets on an ongoing
basis, over time these fees will increase the cost of your investment and may
cost you more than paying other types of sales charges. For additional
information about the plan and its terms, see MULTIPLE CLASS STRUCTURE in the
statement of additional information.




THE FOLLOWING CHANGES ARE EFFECTIVE AUGUST 3, 2007.

THE FOLLOWING REPLACES THE SECOND PARAGRAPH OF THE SERVICE, DISTRIBUTION AND
ADMINISTRATIVE FEES SECTION ON PAGE 24 OF THE PROSPECTUS.

Certain financial intermediaries perform recordkeeping and administrative
services for their clients that would otherwise be performed by American
Century's transfer agent. In some circumstances, the advisor will pay such
service providers a fee for performing those services. Also, the advisor and the
fund's distributor may make payments to intermediaries for various additional
services, other expenses and/or the intermediaries' distribution of the fund out
of their profits or other available sources. Such payments may be made for one
or more of the following: (1) distribution, which may include expenses incurred
by intermediaries for their sales activities with respect to the fund, such as
preparing, printing and distributing sales literature and advertising materials
and compensating registered representatives or other employees of such financial
intermediaries for their sales activities, as well as the opportunity for the
fund to be made available by such intermediaries; (2) shareholder services, such
as providing individual and custom investment advisory services to clients of
the financial intermediaries; and (3) marketing and promotional services,
including business planning assistance, educating personnel about the fund, and
sponsorship of sales meetings, which may include covering costs of providing
speakers, meals and other entertainment. The distributor may sponsor seminars
and conferences designed to educate intermediaries about the fund and may cover
the expenses associated with attendance at such meetings, including travel
costs. These payments and activities are intended to provide an incentive to
intermediaries to sell the fund by educating them about the fund and helping
defray the costs associated with offering the fund. The amount of any payments
described by this paragraph is determined by the advisor or the distributor, and
all such amounts are paid out of the available assets of the advisor and
distributor, and not by you or the fund. As a result, the total expense ratio of
the fund will not be affected by any such payments.

American Century Investment Services, Inc., Distributor

©2007 American Century Proprietary Holdings, Inc. All rights reserved.
The American Century Investments logo, American Century and American Century
Investments are service marks of American Century Proprietary Holdings, Inc.

SH-SPL-55496 0708












American Century World Mutual Funds, Inc.

PROSPECTUS SUPPLEMENT

LIFE SCIENCES FUND

Supplement dated August 3, 2007 * Prospectus dated April 1, 2007

SPECIAL MEETING OF SHAREHOLDERS

At a Special Meeting of Shareholders held July 27, 2007, shareholders of the
fund approved the combination of C Class shares and Advisor Class shares into
Investor Class shares. This combination will be effective November 30, 2007.

Shareholders also approved a change to the Advisor Class fee structure. The
change will result in a decrease of 25 basis points (0.25%) in the Rule 12b-1
fee and a simultaneous increase of 25 basis points in the unified management
fee, resulting in no change to the total expense ratio of the class. The fee
changes will be effective on September 4, 2007.

THE FOLLOWING CHANGES ARE EFFECTIVE ON SEPTEMBER 4, 2007.

AS A RESULT OF THE CHANGE TO THE ADVISOR CLASS FEE STRUCTURE, THE FOLLOWING
REPLACES THE ANNUAL FUND OPERATING EXPENSES TABLE ON PAGE 6 OF THE PROSPECTUS.

ANNUAL FUND OPERATING EXPENSES (EXPENSES THAT ARE DEDUCTED FROM FUND ASSETS)
                 MANAGEMENT  DISTRIBUTION AND         OTHER        TOTAL ANNUAL FUND
                 FEE(1)(2)   SERVICE (12B-1) FEES(3)  EXPENSES(4)  OPERATING EXPENSES
--------------------------------------------------------------------------------------
Investor Class   1.35%       None                     0.01%        1.36%
--------------------------------------------------------------------------------------
Institutional
Class            1.15%       None                     0.01%        1.16%
--------------------------------------------------------------------------------------
C Class          1.35%       1.00%                    0.01%        2.36%
--------------------------------------------------------------------------------------
Advisor Class    1.35%(5)    0.25%(6)                 0.01%        1.61%
--------------------------------------------------------------------------------------

(1)  THE FUND PAYS THE ADVISOR A SINGLE, UNIFIED MANAGEMENT FEE FOR
     ARRANGING ALL SERVICES NECESSARY FOR THE FUND TO OPERATE. THE FEE SHOWN IS
     BASED ON ASSETS DURING THE FUND'S MOST RECENT FISCAL YEAR. THE FUND HAS A
     STEPPED FEE SCHEDULE. AS A RESULT, THE FUND'S UNIFIED MANAGEMENT FEE RATE
     GENERALLY DECREASES AS STRATEGY ASSETS INCREASE AND INCREASES AS STRATEGY
     ASSETS DECREASE. FOR MORE INFORMATION ABOUT THE UNIFIED MANAGEMENT FEE,
     INCLUDING AN EXPLANATION OF STRATEGY ASSETS, SEE The Investment Advisor
     UNDER Management.

(2)  THE EXPENSE INFORMATION REFLECTS THE CURRENT MANAGEMENT FEE AMOUNT,
     WHICH WAS REDUCED EFFECTIVE AUGUST 1, 2006.

(3)  THE 12B-1 FEE IS DESIGNED TO PERMIT INVESTORS TO PURCHASE SHARES
     THROUGH BROKER-DEALERS, BANKS, INSURANCE COMPANIES AND OTHER FINANCIAL
     INTERMEDIARIES. THE FEE MAY BE USED TO COMPENSATE SUCH FINANCIAL
     INTERMEDIARIES FOR DISTRIBUTION AND OTHER SHAREHOLDER SERVICES. FOR MORE
     INFORMATION, SEE Multiple Class Information AND Service, Distribution and
     Administrative Fees, PAGE 25.

(4)  OTHER EXPENSES INCLUDE THE FEES AND EXPENSES OF THE FUND'S INDEPENDENT
     DIRECTORS AND THEIR LEGAL COUNSEL, AS WELL AS INTEREST. OTHER EXPENSES ALSO
     INCLUDE FEES AND EXPENSES INCURRED INDIRECTLY BY THE FUND AS A RESULT OF
     INVESTMENT IN SHARES OF ONE OR MORE MUTUAL FUNDS, HEDGE FUNDS, PRIVATE
     EQUITY FUNDS OR OTHER POOLED INVESTMENT VEHICLES.

(5)  THE UNIFIED MANAGEMENT FEE HAS BEEN RESTATED TO REFLECT THE INCREASE IN THE
     FEE APPROVED BY THE FUND'S SHAREHOLDERS EFFECTIVE SEPTEMBER 4, 2007.

(6)  THE 12B-1 FEE HAS BEEN RESTATED TO REFLECT THE DECREASE IN THE FEE
     EFFECTIVE SEPTEMBER 4, 2007.

THE FOLLOWING REPLACES THE ADVISOR CLASS TABLE ON PAGE 15:

Advisor Class
--------------------------------------------------------------------------------
No initial sales charge
--------------------------------------------------------------------------------
No contingent deferred sales charge
--------------------------------------------------------------------------------
12b-1 fee of 0.25%
--------------------------------------------------------------------------------
No conversion feature
--------------------------------------------------------------------------------
Generally offered through employer-sponsored retirement plans and other fee-
based arrangements
--------------------------------------------------------------------------------




THE FOLLOWING REPLACES THE LAST SENTENCE IN THE C CLASS TABLE ON PAGE 15 OF THE
PROSPECTUS:

Purchases generally limited to investors whose aggregate investments in American
Century funds are less than $1,000,000; generally more appropriate for
short-term investors.

THE FOLLOWING IS ADDED AS THE THIRD PARAGRAPH UNDER THE CALCULATION OF
CONTINGENT DEFERRED SALES CHARGE (CDSC) SECTION ON PAGE 15 OF THE PROSPECTUS:

American Century generally limits purchases of C Class shares to investors whose
aggregate investments in American Century funds are less than $1,000,000.
However, it is your responsibility to inform your financial intermediary and/or
American Century at the time of purchase of any accounts to be aggregated,
including investments in any share class of any American Century fund (excluding
529 account assets and certain assets in money market accounts) in accounts held
by you and your immediate family members (your spouse and children under the age
of 21). Once you reach this limit, you should work with your financial
intermediary to determine what share class is most appropriate for additional
purchases.

THE FOLLOWING REPLACES THE FIRST PARAGRAPH OF THE SERVICE, DISTRIBUTION AND
ADMINISTRATIVE FEES SECTION ON PAGE 25 OF THE PROSPECTUS.

Service, Distribution and Administrative Fees

Investment Company Act Rule 12b-1 permits mutual funds that adopt a written plan
to pay certain expenses associated with the distribution of their shares out of
fund assets. Each class, except the Investor Class and Institutional Class,
offered by this prospectus has a 12b-1 plan. The plans provide for the fund to
pay annual fees of 1.00% for C Class and 0.25% for Advisor Class to the
distributor for distribution and indivudial shareholder services, including past
distribution services. The distributor pays all or a portion of such fees to the
financial intermediaries that make the classes available. Because these fees may
be used to pay for services that are not related to prospective sales of the
fund, each class will continue to make payments under its plan even if it is
closed to new investors. Because these fees are paid out of the fund's assets on
an ongoing basis, over time these fees will increase the cost of your investment
and may cost you more than paying other types of sales charges. For additional
information about the plans and their terms, see MULTIPLE CLASS STRUCTURE in the
statement of additional information.

THE FOLLOWING CHANGES ARE EFFECTIVE ON AUGUST 3, 2007.

THE FOLLOWING REPLACES THE SECOND PARAGRAPH OF THE SERVICE, DISTRIBUTION AND
ADMINISTRATIVE FEES SECTION ON PAGE 26 OF THE PROSPECTUS.

Certain financial intermediaries perform recordkeeping and administrative
services for their clients that would otherwise be performed by American
Century's transfer agent. In some circumstances, the advisor will pay such
service providers a fee for performing those services. Also, the advisor and the
fund's distributor may make payments to intermediaries for various additional
services, other expenses and/or the intermediaries' distribution of the fund out
of their profits or other available sources. Such payments may be made for one
or more of the following: (1) distribution, which may include expenses incurred
by intermediaries for their sales activities with respect to the fund, such as
preparing, printing and distributing sales literature and advertising materials
and compensating registered representatives or other employees of such financial
intermediaries for their sales activities, as well as the opportunity for the
fund to be made available by such intermediaries; (2) shareholder services, such
as providing individual and custom investment advisory services to clients of
the financial intermediaries; and (3) marketing and promotional services,
including business planning assistance, educating personnel about the fund, and
sponsorship of sales meetings, which may include covering costs of providing
speakers, meals and other entertainment. The distributor may sponsor seminars
and conferences designed to educate intermediaries about the fund and may cover
the expenses associated with attendance at such meetings, including travel
costs. These payments and activities are intended to provide an incentive to
intermediaries to sell the fund by educating them about the fund and helping
defray the costs associated with offering the fund. The amount of any payments
described by this paragraph is determined by the advisor or the distributor, and
all such amounts are paid out of the available assets of the advisor and
distributor, and not by you or the fund. As a result, the total expense ratio of
the fund will not be affected by any such payments.

American Century Investment Services, Inc., Distributor

©2007 American Century Proprietary Holdings, Inc. All rights reserved.
The American Century Investments logo, American Century and American Century
Investments are service marks of American Century Proprietary Holdings, Inc.

SH-SPL-55492REV  0708












American Century World Mutual Funds, Inc.

PROSPECTUS SUPPLEMENT

INTERNATIONAL DISCOVERY FUND

Supplement dated August 3, 2007 * Prospectus dated April 1, 2007

SPECIAL MEETING OF SHAREHOLDERS

At a Special Meeting of Shareholders held July 27, 2007, shareholders of the
fund approved a change to the Advisor Class fee structure. The change will
result in a decrease of 25 basis points (0.25%) in the Rule 12b-1 fee and a
simultaneous increase of 25 basis points in the unified management fee,
resulting in no change to the total expense ratio of the class. The fee changes
will be effective on September 4, 2007.

THE FOLLOWING CHANGES ARE EFFECTIVE ON SEPTEMBER 4, 2007.

AS A RESULT OF THE CHANGE TO THE ADVISOR CLASS FEE STRUCTURE, THE FOLLOWING
REPLACES THE ANNUAL FUND OPERATING EXPENSES TABLE ON PAGE 6 OF THE PROSPECTUS.

ANNUAL FUND OPERATING EXPENSES (EXPENSES THAT ARE DEDUCTED FROM FUND ASSETS)
                MANAGEMENT  DISTRIBUTION AND         OTHER        TOTAL ANNUAL FUND
                FEE(1)      SERVICE (12B-1) FEES(2)  EXPENSES(3)  OPERATING EXPENSES
------------------------------------------------------------------------------------
Investor Class  1.40%       None                     0.01%        1.41%
------------------------------------------------------------------------------------
Institutional
Class           1.20%       None                     0.01%        1.21%
------------------------------------------------------------------------------------
Advisor Class   1.40%(4)    0.25%(5)                 0.01%        1.66%
------------------------------------------------------------------------------------

(1)  THE FUND PAYS THE ADVISOR A SINGLE, UNIFIED MANAGEMENT FEE FOR
     ARRANGING ALL SERVICES NECESSARY FOR THE FUND TO OPERATE. THE FEE SHOWN IS
     BASED ON ASSETS DURING THE FUND'S MOST RECENT FISCAL YEAR. THE FUND HAS A
     STEPPED FEE SCHEDULE. AS A RESULT, THE FUND'S UNIFIED MANAGEMENT FEE RATE
     GENERALLY DECREASES AS STRATEGY ASSETS INCREASE AND INCREASES AS STRATEGY
     ASSETS DECREASE. FOR MORE INFORMATION ABOUT THE UNIFIED MANAGEMENT FEE,
     INCLUDING AN EXPLANATION OF STRATEGY ASSETS, SEE The Investment Advisor
     UNDER Management.

(2)  THE 12B-1 FEE IS DESIGNED TO PERMIT INVESTORS TO PURCHASE SHARES
     THROUGH BROKER-DEALERS, BANKS, INSURANCE COMPANIES AND OTHER FINANCIAL
     INTERMEDIARIES. THE FEE MAY BE USED TO COMPENSATE SUCH FINANCIAL
     INTERMEDIARIES FOR DISTRIBUTION AND OTHER SHAREHOLDER SERVICES. FOR MORE
     INFORMATION, SEE Multiple Class Information AND Service, Distribution and
     Administrative Fees, PAGE 25.

(3)  OTHER EXPENSES INCLUDE THE FEES AND EXPENSES OF THE FUND'S INDEPENDENT
     DIRECTORS AND THEIR LEGAL COUNSEL, AS WELL AS INTEREST.

(4)  THE UNIFIED MANAGEMENT FEE HAS BEEN RESTATED TO REFLECT THE INCREASE IN THE
     FEE APPROVED BY THE FUND'S SHAREHOLDERS EFFECTIVE SEPTEMBER 4, 2007.

(5)  THE 12B-1 FEE HAS BEEN RESTATED TO REFLECT THE DECREASE IN THE FEE
     EFFECTIVE SEPTEMBER 4, 2007.

THE FOLLOWING REPLACES THE FIRST PARAGRAPH OF THE SERVICE, DISTRIBUTION AND
ADMINISTRATIVE FEES SECTION ON PAGE 25 OF THE PROSPECTUS.

Investment Company Act Rule 12b-1 permits mutual funds that adopt a written plan
to pay certain expenses associated with the distribution of their shares out of
fund assets. The Advisor Class offered by this prospectus has a 12b-1 plan.
Under the Advisor Class Plan, the fund's Advisor Class pays the distributor an
annual fee of 0.25% of Advisor Class average net assets, for distribution and
individual shareholder services, including past distribution services. The
distributor pays all or a portion of such fees to the financial intermediaries
that make Advisor Class shares available. Because these fees may be used to pay
for services that are not related to prospective sales of the fund, the Advisor
Class will continue to make payments under its plan even if it is closed to new
investors. Because these fees are paid out of the fund's assets on an ongoing
basis, over time these fees will increase the cost of your investment and may
cost you more than paying other types of sales charges. For additional
information about the plan and its terms, see MULTIPLE CLASS STRUCTURE in the
statement of additional information.




THE FOLLOWING CHANGES ARE EFFECTIVE ON AUGUST 3, 2007.

THE FOLLOWING REPLACES THE SECOND PARAGRAPH OF THE SERVICE, DISTRIBUTION AND
ADMINISTRATIVE FEES SECTION ON PAGE 25 OF THE PROSPECTUS.

Certain financial intermediaries perform recordkeeping and administrative
services for their clients that would otherwise be performed by American
Century's transfer agent. In some circumstances, the advisor will pay such
service providers a fee for performing those services. Also, the advisor and the
fund's distributor may make payments to intermediaries for various additional
services, other expenses and/or the intermediaries' distribution of the fund out
of their profits or other available sources. Such payments may be made for one
or more of the following: (1) distribution, which may include expenses incurred
by intermediaries for their sales activities with respect to the fund, such as
preparing, printing and distributing sales literature and advertising materials
and compensating registered representatives or other employees of such financial
intermediaries for their sales activities, as well as the opportunity for the
fund to be made available by such intermediaries; (2) shareholder services, such
as providing individual and custom investment advisory services to clients of
the financial intermediaries; and (3) marketing and promotional services,
including business planning assistance, educating personnel about the fund, and
sponsorship of sales meetings, which may include covering costs of providing
speakers, meals and other entertainment. The distributor may sponsor seminars
and conferences designed to educate intermediaries about the fund and may cover
the expenses associated with attendance at such meetings, including travel
costs. These payments and activities are intended to provide an incentive to
intermediaries to sell the fund by educating them about the fund and helping
defray the costs associated with offering the fund. The amount of any payments
described by this paragraph is determined by the advisor or the distributor, and
all such amounts are paid out of the available assets of the advisor and
distributor, and not by you or the fund. As a result, the total expense ratio of
the fund will not be affected by any such payments.

American Century Investment Services, Inc., Distributor

©2007 American Century Proprietary Holdings, Inc. All rights reserved.
The American Century Investments logo, American Century and American Century
Investments are service marks of American Century Proprietary Holdings, Inc.

SH-SPL-55490 0708












PROSPECTUS SUPPLEMENT

American Century World Mutual Funds, Inc.

INTERNATIONAL VALUE FUND

Supplement dated August 3, 2007 * Prospectus dated April 1, 2007

THE FOLLOWING CHANGES ARE EFFECTIVE SEPTEMBER 4, 2007.

THE FOLLOWING REPLACES THE TABLE ON PAGE 14 OF THE PROSPECTUS:

A CLASS                           B CLASS
--------------------------------------------------------------------------------
Initial sales charge(1)           No initial sales charge
--------------------------------------------------------------------------------
Generally no contingent deferred  Contingent deferred sales charge
sales charge(2)                   on redemptions within six years
--------------------------------------------------------------------------------
12b-1 fee of 0.25%(3)             12b-1 fee of 1.00%(4)
--------------------------------------------------------------------------------
No conversion feature             Convert to A Class shares eight
                                  years after purchase
--------------------------------------------------------------------------------
Generally more appropriate for    Purchases generally limited to investors
long-term investors               whose aggregate investments in American
                                  Century funds are less than $50,000; generally
                                  offered through financial intermediaries(5)
--------------------------------------------------------------------------------

C CLASS                           R CLASS
--------------------------------------------------------------------------------
No initial sales charge           No initial sales charge
--------------------------------------------------------------------------------
Contingent deferred sales charge  No contingent deferred sales charge
on redemptions within 12 months
--------------------------------------------------------------------------------
12b-1 fee of 1.00%                12b-1 fee of 0.50%
--------------------------------------------------------------------------------
No conversion feature             No conversion feature
--------------------------------------------------------------------------------
Purchases generally limited to    Generally offered through employer-sponsored
investors whose aggregate         retirement plans and other fee-based
investments in American Century   arrangements(6)
funds are less than $1,000,000;
generally more appropriate
for short-term investors
--------------------------------------------------------------------------------

(1)  THE SALES CHARGE FOR A CLASS SHARES DECREASES DEPENDING ON THE SIZE OF
     YOUR INVESTMENT, AND MAY BE WAIVED FOR SOME PURCHASES. THERE IS NO SALES
     CHARGE FOR PURCHASES OF $1,000,000 OR MORE.

(2)  A CONTINGENT DEFERRED SALES CHARGE (CDSC) OF 1.00% WILL BE CHARGED ON
     CERTAIN PURCHASES OF $1,000,000 OR MORE THAT ARE REDEEMED WITHIN ONE YEAR
     OF PURCHASE.

(3)  EFFECTIVE APRIL 1, 2006 THROUGH MARCH 31, 2008, AMERICAN CENTURY
     AGREED TO A TWO-YEAR WAIVER OF RULE 12B-1 FEES FOR CERTAIN CLASSES OF THE
     FUND. TAKING INTO ACCOUNT THE WAIVER, THE 12B-1 FEE IS 0.10%.

(4)  EFFECTIVE APRIL 1, 2006 THROUGH MARCH 31, 2008, AMERICAN CENTURY
     AGREED TO A TWO-YEAR WAIVER OF RULE 12B-1 FEES FOR CERTAIN CLASSES OF THE
     FUND. TAKING INTO ACCOUNT THE WAIVER, THE 12B-1 FEE IS 0.79%.

(5)  INVESTORS IN SIMPLE IRA PLANS, SEP IRA PLANS AND SARSEP PLANS
     ESTABLISHED PRIOR TO AUGUST 1, 2006, MAY MAKE ADDITIONAL PURCHASES. THIS
     CLASS IS NOT AVAILABLE FOR NEW EMPLOYER-SPONSORED RETIREMENT PLAN ACCOUNTS.

(6)  IRA ACCOUNTS IN R CLASS SHARES ESTABLISHED THROUGH FINANCIAL
     INTERMEDIARIES PRIOR TO AUGUST 1, 2006, MAY MAKE ADDITIONAL PURCHASES.




THE FOLLOWING REPLACES THE REDUCTIONS AND WAIVERS OF SALES CHARGES FOR A CLASS
SECTION ON PAGES 15 AND 16 OF THE PROSPECTUS:

Reductions and Waivers of Sales Charges for A Class

You may qualify for a reduction or waiver of certain sales charges, but you or
your financial professional must provide certain information, including the
account numbers of any accounts to be aggregated, to American Century at the
time of purchase in order to take advantage of such reduction or waiver. If you
hold assets among multiple intermediaries, it is your responsibility to inform
your intermediary and/or American Century at the time of purchase of any
accounts to be aggregated.

You and your immediate family (your spouse and your children under the age of
21) may combine investments in any share class of any American Century fund
(excluding 529 account assets and certain assets in money market accounts) to
reduce your A Class sales charge in the following ways:

ACCOUNT AGGREGATION. Investments made by you and your immediate family may be
aggregated at each account's current market value if made for your own
account(s) and/or certain other accounts, such as:

*  Certain trust accounts

*  Solely controlled business accounts

*  Single-participant retirement plans

*  Endowments or foundations established and controlled by you or an
   immediate family member

For purposes of aggregation, only investments made through individual-level
accounts may be combined. Assets held in multiple participant employer-sponsored
retirement plans may be aggregated at a plan level.

CONCURRENT PURCHASES. You may combine simultaneous purchases in any share class
of any American Century fund to qualify for a reduced A Class sales charge.

RIGHTS OF ACCUMULATION. You may take into account the current value of your
existing holdings, less any commissionable shares in the money market funds, in
any share class of any American Century fund to qualify for a reduced A Class
sales charge.

LETTER OF INTENT. A Letter of Intent allows you to combine all non-money market
fund purchases of any share class of any American Century fund you intend to
make over a 13-month period to determine the applicable sales charge. At your
request, existing holdings may be combined with new purchases and sales charge
amounts may be adjusted for purchases made within 90 days prior to our receipt
of the Letter of Intent. Capital appreciation, capital gains and reinvested
dividends earned during the Letter of Intent period do not apply toward its
completion. A portion of your account will be held in escrow to cover additional
A Class sales charges that will be due if your total investments over the
13-month period do not qualify for the applicable sales charge reduction.

WAIVERS FOR CERTAIN INVESTORS. The sales charge on A Class shares may be waived
for:

*  Purchases by registered representatives and other employees of certain
   financial intermediaries (and their immediate family members) having selling
   agreements with the advisor or distributor

*  Broker-dealer sponsored wrap program accounts and/or fee-based accounts
   maintained for clients of certain financial intermediaries who have entered
   into selling agreements with American Century

*  Present or former officers, directors and employees (and their families)
   of American Century

*  Employer-sponsored retirement plan purchases. For plans under $1 million
   in assets, purchases with sales charges are allowed, but may be subject to
   the retirement plan recordkeeper's policies. Refer to BUYING AND SELLING FUND
   SHARES in the statement of additional information

*  IRA Rollovers from any American Century fund held in an employer-sponsored
   retirement plan

*  Certain other investors as deemed appropriate by American Century

THE FOLLOWING IS ADDED AS THE LAST PARAGRAPH UNDER THE B CLASS SECTION ON PAGE
16 OF THE PROSPECTUS:

American Century generally limits purchases of B Class shares to investors whose
aggregate investments in American Century funds are less than $50,000. However,
it is your responsibility to inform your financial intermediary and/or American
Century at the time of purchase of any accounts to be aggregated, including
investments in any share class of any American Century fund (excluding 529
account assets and certain assets in money market accounts) in accounts held by
you and your immediate family members (your spouse and children under the age of
21). Once you reach this limit, you should work with your financial intermediary
to determine what share class is most appropriate for additional purchases.




THE FOLLOWING IS ADDED AS THE LAST PARAGRAPH UNDER THE C CLASS SECTION ON PAGE
17 OF THE PROSPECTUS:

American Century generally limits purchases of C Class shares to investors whose
aggregate investments in American Century funds are less than $1,000,000.
However, it is your responsibility to inform your financial intermediary and/or
American Century at the time of purchase of any accounts to be aggregated,
including investments in any share class of any American Century fund (excluding
529 account assets and certain assets in money market accounts) in accounts held
by you and your immediate family members (your spouse and children under the age
of 21). Once you reach this limit, you should work with your financial
intermediary to determine what share class is most appropriate for additional
purchases.

THE FOLLOWING REPLACES THE SECOND TO THE LAST BULLET UNDER THE CDSC WAIVERS
SECTION ON PAGE 17 OF THE PROSPECTUS:

*  IRA Rollovers from any American Century fund held in an employer-sponsored
   retirement plan, for A Class shares only

THE FOLLOWING REPLACES THE FIRST SENTENCE UNDER THE EXCHANGING SHARES SECTION ON
PAGE 18 OF THE PROSPECTUS:

You may exchange shares of the fund for shares of the same class of another
American Century fund without a sales charge if you meet the following criteria:

THE FOLLOWING REPLACES THE FIRST SENTENCE OF THE THIRD PARAGRAPH UNDER THE
REDEMPTIONS SECTION ON PAGE 20 OF THE PROSPECTUS:

If you sell B, C or, in certain cases, A Class shares, you may pay a sales
charge, depending on how long you have held your shares, as described above.

THE FOLLOWING CHANGE IS EFFECTIVE AUGUST 3, 2007.

THE FOLLOWING REPLACES THE SECOND PARAGRAPH OF THE SERVICE, DISTRIBUTION AND
ADMINISTRATIVE FEES SECTION ON PAGE 28 OF THE PROSPECTUS:

Certain financial intermediaries perform recordkeeping and administrative
services for their clients that would otherwise be performed by American
Century's transfer agent. In some circumstances, the advisor will pay such
service providers a fee for performing those services. Also, the advisor and the
fund's distributor may make payments to intermediaries for various additional
services, other expenses and/or the intermediaries' distribution of the fund out
of their profits or other available sources. Such payments may be made for one
or more of the following: (1) distribution, which may include expenses incurred
by intermediaries for their sales activities with respect to the fund, such as
preparing, printing and distributing sales literature and advertising materials
and compensating registered representatives or other employees of such financial
intermediaries for their sales activities, as well as the opportunity for the
fund to be made available by such intermediaries; (2) shareholder services, such
as providing individual and custom investment advisory services to clients of
the financial intermediaries; and (3) marketing and promotional services,
including business planning assistance, educating personnel about the fund, and
sponsorship of sales meetings, which may include covering costs of providing
speakers, meals and other entertainment. The distributor may sponsor seminars
and conferences designed to educate intermediaries about the fund and may cover
the expenses associated with attendance at such meetings, including travel
costs. These payments and activities are intended to provide an incentive to
intermediaries to sell the fund by educating them about the fund and helping
defray the costs associated with offering the fund. The amount of any payments
described by this paragraph is determined by the advisor or the distributor, and
all such amounts are paid out of the available assets of the advisor and
distributor, and not by you or the fund. As a result, the total expense ratio of
the fund will not be affected by any such payments.

American Century Investment Services, Inc., Distributor

©2007 American Century Proprietary Holdings, Inc. All rights reserved.
The American Century Investments logo, American Century and American Century
Investments are service marks of American Century Proprietary Holdings, Inc.

SH-SPL-56317 0708












American Century World Mutual Funds, Inc.

PROSPECTUS SUPPLEMENT

INTERNATIONAL GROWTH FUND

Supplement dated August 3, 2007 * Prospectus dated April 1, 2007

SPECIAL MEETING OF SHAREHOLDERS

One of the Special Meetings of Shareholders of the fund originally scheduled
for June 27, 2007, has been adjourned to August 24, 2007. Shareholders as of
the close of business on April 13, 2007, are being asked to approve a
conversion of their A Class shares to Advisor Class shares of the same fund.

For more information about the proposal under consideration, please contact
American Century's proxy solicitor at 1-877-256-6083 to request a free copy
of the applicable proxy statement.

At a Special Meeting of Shareholders held July 27, 2007, shareholders of the
fund approved a change to the Advisor Class fee structure. The fee structure
change will result in a decrease of 25 basis points (0.25%) in the Rule 12b-1
fee and a simultaneous increase of 25 basis points in the unified management
fee, resulting in no change to the total expense ratio of the class.

THE FOLLOWING CHANGES ARE EFFECTIVE SEPTEMBER 4, 2007.

THE FOLLOWING REPLACES THE ANNUAL FUND OPERATING EXPENSES TABLE ON PAGE 6
OF THE PROSPECTUS:

ANNUAL FUND OPERATING EXPENSES (EXPENSES THAT ARE DEDUCTED FROM FUND ASSETS)
                                DISTRIBUTION                    TOTAL ANNUAL
                  MANAGEMENT    AND SERVICE       OTHER         FUND OPERATING
                  FEE(1)        (12B-1) FEES(2)   EXPENSES(3)   EXPENSES
--------------------------------------------------------------------------------
Investor Class    1.25%         None              0.01%         1.26%
--------------------------------------------------------------------------------
Institutional     1.05%         None              0.01%         1.06%
Class
--------------------------------------------------------------------------------
A Class           1.25%         0.25%             0.01%         1.51%
--------------------------------------------------------------------------------
B Class           1.25%         1.00%             0.01%         2.26%
--------------------------------------------------------------------------------
C Class           1.25%         1.00%             0.01%         2.26%
--------------------------------------------------------------------------------
R Class           1.25%         0.50%             0.01%         1.76%
--------------------------------------------------------------------------------
Advisor Class     1.25%         0.25%             0.01%         1.51%
--------------------------------------------------------------------------------

THE FOLLOWING REPLACES FOOTNOTE 2 TO THE Annual Fund Operating Expenses TABLE
ON PAGE 6 OF THE PROSPECTUS:

(2)  THE 12B-1 FEE IS DESIGNED TO PERMIT INVESTORS TO PURCHASE SHARES THROUGH
     BROKER-DEALERS, BANKS, INSURANCE COMPANIES AND OTHER FINANCIAL
     INTERMEDIARIES. THE FEE MAY BE USED TO COMPENSATE SUCH FINANCIAL
     INTERMEDIARIES FOR DISTRIBUTION AND OTHER SHAREHOLDER SERVICES. FOR MORE
     INFORMATION, SEE Multiple Class Information and Service, Distribution and
     Administrative Fees, PAGE 28.




THE FOLLOWING REPLACES THE TABLE ON PAGE 15 OF THE PROSPECTUS:

A CLASS                               B CLASS
--------------------------------------------------------------------------------
Initial sales charge(1)               No initial sales charge
--------------------------------------------------------------------------------
Generally no contingent deferred      Contingent deferred sales charge
sales charge(2)                       on redemptions within six years
--------------------------------------------------------------------------------
12b-1 fee of 0.25%                    12b-1 fee of 1.00%
--------------------------------------------------------------------------------
No conversion feature                 Convert to A Class shares eight
                                      years after purchase
--------------------------------------------------------------------------------
Generally more appropriate            Purchases generally limited to investors
for long-term investors               whose aggregate investments in American
                                      Century funds are less than $50,000;
                                      generally offered through financial
                                      intermediaries(3)
--------------------------------------------------------------------------------

C CLASS                                      R CLASS
--------------------------------------------------------------------------------
No initial sales charge                      No initial sales charge
--------------------------------------------------------------------------------
Contingent deferred sales charge             No contingent deferred sales charge
on redemptions within 12 months
--------------------------------------------------------------------------------
12b-1 fee of 1.00%                           12b-1 fee of 0.50%
--------------------------------------------------------------------------------
No conversion feature                        No conversion feature
--------------------------------------------------------------------------------
Purchases generally limited to investors     Generally offered through
whose aggregate investments in American      employer-sponsored retirement plans
Century funds are less than $1,000,000;      and other fee-based arrangements(4)
generally more appropriate for short-term
investors
--------------------------------------------------------------------------------


Advisor Class
--------------------------------------------------------------------------------
No initial sales charge
--------------------------------------------------------------------------------
No contingent deferred sales charge
--------------------------------------------------------------------------------
12b-1 fee of 0.25%
--------------------------------------------------------------------------------
No conversion feature
--------------------------------------------------------------------------------
Generally offered through employer-sponsored
retirement plans and other fee-based arrangements
--------------------------------------------------------------------------------

(1)  THE SALES CHARGE FOR A CLASS SHARES DECREASES DEPENDING ON THE SIZE OF
     YOUR INVESTMENT, AND MAY BE WAIVED FOR SOME PURCHASES. THERE IS NO SALES
     CHARGE FOR PURCHASES OF $1,000,000 OR MORE.

(2)  A CONTINGENT DEFERRED SALES CHARGE (CDSC) OF 1.00% WILL BE CHARGED ON
     CERTAIN PURCHASES OF $1,000,000 OR MORE THAT ARE REDEEMED WITHIN ONE YEAR
     OF PURCHASE.

(3)  INVESTORS IN SIMPLE IRA PLANS, SEP IRA PLANS AND SARSEP PLANS
     ESTABLISHED PRIOR TO AUGUST 1, 2006, MAY MAKE ADDITIONAL PURCHASES. THIS
     CLASS IS NOT AVAILABLE FOR NEW EMPLOYER-SPONSORED RETIREMENT PLAN ACCOUNTS.

(4)  IRA ACCOUNTS IN R CLASS SHARES ESTABLISHED THROUGH FINANCIAL
     INTERMEDIARIES PRIOR TO AUGUST 1, 2006, MAY MAKE ADDITIONAL PURCHASES.

THE FOLLOWING REPLACES THE REDUCTIONS AND WAIVERS OF SALES CHARGES FOR A CLASS
SECTION ON PAGES 16 AND 17 OF THE PROSPECTUS:

Reductions and Waivers of Sales Charges for A Class

You may qualify for a reduction or waiver of certain sales charges, but you or
your financial professional must provide certain information, including the
account numbers of any accounts to be aggregated, to American Century at the
time of purchase in order to take advantage of such reduction or waiver. If you
hold assets among multiple intermediaries, it is your responsibility to inform
your intermediary and/or American Century at the time of purchase of any
accounts to be aggregated.

You and your immediate family (your spouse and your children under the age of
21) may combine investments in any share class of any American Century fund
(excluding 529 account assets and certain assets in money market accounts) to
reduce your A Class sales charge in the following ways:

ACCOUNT AGGREGATION. Investments made by you and your immediate family may be
aggregated at each account's current market value if made for your own
account(s) and/or certain other accounts, such as:

*  Certain trust accounts

*  Solely controlled business accounts

*  Single-participant retirement plans

*  Endowments or foundations established and controlled by you or an
   immediate family member




For purposes of aggregation, only investments made through individual-level
accounts may be combined. Assets held in multiple participant employer-sponsored
retirement plans may be aggregated at a plan level.

CONCURRENT PURCHASES. You may combine simultaneous purchases in any share class
of any American Century fund to qualify for a reduced A Class sales charge.

RIGHTS OF ACCUMULATION. You may take into account the current value of your
existing holdings, less any commissionable shares in the money market funds, in
any share class of any American Century fund to qualify for a reduced A Class
sales charge.

LETTER OF INTENT. A Letter of Intent allows you to combine all non-money market
fund purchases of any share class of any American Century fund you intend to
make over a 13-month period to determine the applicable sales charge. At your
request, existing holdings may be combined with new purchases and sales charge
amounts may be adjusted for purchases made within 90 days prior to our receipt
of the Letter of Intent. Capital appreciation, capital gains and reinvested
dividends earned during the Letter of Intent period do not apply toward its
completion. A portion of your account will be held in escrow to cover additional
A Class sales charges that will be due if your total investments over the
13-month period do not qualify for the applicable sales charge reduction.

WAIVERS FOR CERTAIN INVESTORS. The sales charge on A Class shares may be waived
for:

*  Purchases by registered representatives and other employees of certain
   financial intermediaries (and their immediate family members) having selling
   agreements with the advisor or distributor

*  Broker-dealer sponsored wrap program accounts and/or fee-based accounts
   maintained for clients of certain financial intermediaries who have entered
   into selling agreements with American Century

*  Present or former officers, directors and employees (and their families)
   of American Century

*  Employer-sponsored retirement plan purchases. For plans under $1 million
   in assets, purchases with sales charges are allowed, but may be subject to
   the retirement plan recordkeeper's policies. Refer to BUYING AND SELLING FUND
   SHARES in the statement of additional information

*  IRA Rollovers from any American Century fund held in an employer-sponsored
   retirement plan

*  Shares purchased in accounts that held Advisor Class shares of this fund
   prior to September 4, 2007

*  Certain other investors as deemed appropriate by American Century

THE FOLLOWING IS ADDED AS THE LAST PARAGRAPH UNDER THE B CLASS SECTION ON PAGE
17 OF THE PROSPECTUS:

American Century generally limits purchases of B Class shares to investors whose
aggregate investments in American Century funds are less than $50,000. However,
it is your responsibility to inform your financial intermediary and/or American
Century at the time of purchase of any accounts to be aggregated, including
investments in any share class of any American Century fund (excluding 529
account assets and certain assets in money market accounts) in accounts held by
you and your immediate family members (your spouse and children under the age of
21). Once you reach this limit, you should work with your financial intermediary
to determine what share class is most appropriate for additional purchases.

THE FOLLOWING IS ADDED AS THE LAST PARAGRAPH UNDER THE C CLASS SECTION ON PAGE
18 OF THE PROSPECTUS:

American Century generally limits purchases of C Class shares to investors whose
aggregate investments in American Century funds are less than $1,000,000.
However, it is your responsibility to inform your financial intermediary and/or
American Century at the time of purchase of any accounts to be aggregated,
including investments in any share class of any American Century fund (excluding
529 account assets and certain assets in money market accounts) in accounts held
by you and your immediate family members (your spouse and children under the age
of 21). Once you reach this limit, you should work with your financial
intermediary to determine what share class is most appropriate for additional
purchases.

THE FOLLOWING REPLACES THE SECOND TO THE LAST BULLET UNDER THE CDSC WAIVERS
SECTION ON PAGE 18 OF THE PROSPECTUS:

*  IRA Rollovers from any American Century fund held in an employer-sponsored
   retirement plan, for A Class shares only

THE FOLLOWING REPLACES THE FIRST SENTENCE UNDER REINSTATEMENT PRIVILEGE ON PAGE
18 OF THE PROSPECTUS:

Within 90 days of a redemption of any A or B Class shares, you may reinvest all
of the redemption proceeds in A Class shares of any American Century fund at the
then-current net asset value without paying an initial sales charge.




THE FOLLOWING REPLACES THE FIRST SENTENCE UNDER EXCHANGING SHARES ON PAGE 19 OF
THE PROSPECTUS:

You may exchange shares of the fund for shares of the same class of another
American Century fund without a sales charge if you meet the following criteria:

THE FOLLOWING REPLACES THE THIRD PARAGRAPH UNDER REDEMPTIONS ON PAGE 21 OF THE
PROSPECTUS:

If you sell B, C or, in certain cases, A Class shares, you may pay a sales
charge, depending on how long you have held your shares, as described above.

THE FOLLOWING REPLACES THE FIRST PARAGRAPH UNDER MULTIPLE CLASS INFORMATION ON
PAGE 28 OF THE PROSPECTUS:

American Century offers the following classes of the fund: Investor Class,
Institutional Class, A Class, B Class, C Class and R Class.

THE FOLLOWING REPLACES THE FIRST PARAGRAPH OF THE SERVICE, DISTRIBUTION AND
ADMINISTRATIVE FEES SECTION ON PAGE 28 OF THE PROSPECTUS:

Service, Distribution and Administrative Fees

Investment Company Act Rule 12b-1 permits mutual funds that adopt a written
plan to pay certain expenses associated with the distribution of their shares
out of fund assets. Each class, except the Investor Class and Institutional
Class, offered by this prospectus has a 12b-1 plan. The plans provide for the
fund to pay annual fees of 0.25% for A Class, 1.00% for B and C Class, and
0.50% for R Class to the distributor. The distributor may use these fees for
distribution and individual shareholder services, including past distribution
services. The distributor pays all or a portion of such fees to the financial
intermediaries that make the classes available. Because these fees may be used
to pay for services that are not related to prospective sales of the fund, each
class will continue to make payments under its plan even if it is closed to new
investors. Because these fees are paid out of the fund's assets on an ongoing
basis, over time these fees will increase the cost of your investment and may
cost you more than other types of sales charges. The higher fees for B and C
Class shares may cost you more over time than paying the initial sales charge
for A Class shares. For additional information about the plans and their terms,
see MULTIPLE CLASS STRUCTURE in the statement of additional information.

THE FOLLOWING CHANGES ARE EFFECTIVE AUGUST 3, 2007.

THE FOLLOWING REPLACES THE SECOND PARAGRAPH OF THE SERVICE, DISTRIBUTION AND
ADMINISTRATIVE FEES SECTION ON PAGES 28 AND 29 OF THE PROSPECTUS:

Certain financial intermediaries perform recordkeeping and administrative
services for their clients that would otherwise be performed by American
Century's transfer agent. In some circumstances, the advisor will pay such
service providers a fee for performing those services. Also, the advisor and the
fund's distributor may make payments to intermediaries for various additional
services, other expenses and/or the intermediaries' distribution of the fund out
of their profits or other available sources. Such payments may be made for one
or more of the following: (1) distribution, which may include expenses incurred
by intermediaries for their sales activities with respect to the fund, such as
preparing, printing and distributing sales literature and advertising materials
and compensating registered representatives or other employees of such financial
intermediaries for their sales activities, as well as the opportunity for the
fund to be made available by such intermediaries; (2) shareholder services, such
as providing individual and custom investment advisory services to clients of
the financial intermediaries; and (3) marketing and promotional services,
including business planning assistance, educating personnel about the fund, and
sponsorship of sales meetings, which may include covering costs of providing
speakers, meals and other entertainment. The distributor may sponsor seminars
and conferences designed to educate intermediaries about the fund and may cover
the expenses associated with attendance at such meetings, including travel
costs. These payments and activities are intended to provide an incentive to
intermediaries to sell the fund by educating them about the fund and helping
defray the costs associated with offering the fund. The amount of any payments
described by this paragraph is determined by the advisor or the distributor, and
all such amounts are paid out of the available assets of the advisor and
distributor, and not by you or the fund. As a result, the total expense ratio of
the fund will not be affected by any such payments.

American Century Investment Services, Inc., Distributor

©2007 American Century Proprietary Holdings, Inc. All rights reserved.

The American Century Investments logo, American Century and American Century
Investments are service marks of American Century Proprietary Holdings, Inc.

SH-SPL-55516 0708












American Century World Mutual Funds, Inc.

PROSPECTUS SUPPLEMENT

GLOBAL GROWTH FUND

Supplement dated August 3, 2007 * Prospectus dated April 1, 2007

SPECIAL MEETING OF SHAREHOLDERS

At a Special Meeting of Shareholders held July 27, 2007, shareholders of the
fund approved a change to the Advisor Class fee structure and the
combination of A Class shares into Advisor Class shares. The fee structure
change will result in a decrease of 25 basis points (0.25%) in the Rule 12b-1
fee and a simultaneous increase of 25 basis points in the unified management
fee, resulting in no change to the total expense ratio of the class. In
addition, the fund's Advisor Class will be renamed A Class and will become
subject to a maximum 5.75% front-end sales load.

THE FOLLOWING CHANGES ARE EFFECTIVE ON SEPTEMBER 4, 2007.

THE A CLASS AVERAGE ANNUAL TOTAL RETURNS TABLE ON PAGE 4 OF THE PROSPECTUS IS
DELETED. THE FOLLOWING REPLACES THE ADVISOR CLASS AVERAGE ANNUAL TOTAL RETURNS
TABLE ON PAGE 5 OF THE PROSPECTUS:

A CLASS(1)
                                                                   LIFE
FOR THE CALENDAR YEAR ENDED DECEMBER 31, 2006   1 YEAR   5 YEARS   OF CLASS(2)
--------------------------------------------------------------------------------
Return Before Taxes                             11.15%   9.94%     9.32%
MSCI World Free Index                           20.07%   9.97%     4.52%(3)
   (reflects no deduction
   for fees, expenses or taxes)
--------------------------------------------------------------------------------

(1)  PRIOR TO SEPTEMBER 4, 2007, THE A CLASS WAS REFERRED TO AS THE ADVISOR
     CLASS. PERFORMANCE PRIOR TO THAT DATE HAS BEEN RESTATED TO REFLECT THE A
     CLASS SALES CHARGE.

(2)  THE INCEPTION DATE FOR THE A CLASS IS FEBRUARY 5, 1999.

(3)  SINCE JANUARY 31, 1999, THE DATE CLOSEST TO THE CLASS'S INCEPTION FOR
     WHICH DATA IS AVAILABLE.

THE COLUMN FOR THE ADVISOR CLASS IS DELETED FROM THE SHAREHOLDER FEES TABLE ON
PAGE 6 OF THE PROSPECTUS.

THE ROW FOR THE ADVISOR CLASS IS DELETED FROM THE ANNUAL FUND OPERATING EXPENSES
TABLE ON PAGE 6.

THE FOLLOWING REPLACES FOOTNOTE 2 TO THE ANNUAL FUND OPERATING EXPENSES TABLE ON
PAGE 6 OF THE PROSPECTUS:

(2)  THE 12B-1 FEE IS DESIGNED TO PERMIT INVESTORS TO PURCHASE SHARES
     THROUGH BROKER-DEALERS, BANKS, INSURANCE COMPANIES AND OTHER FINANCIAL
     INTERMEDIARIES. THE FEE MAY BE USED TO COMPENSATE SUCH FINANCIAL
     INTERMEDIARIES FOR DISTRIBUTION AND OTHER SHAREHOLDER SERVICES. FOR MORE
     INFORMATION, SEE Multiple Class Information AND Service, Distribution and
     Administrative Fees, PAGE 29.

THE ROWS FOR THE ADVISOR CLASS ARE DELETED FROM THE EXAMPLE TABLES ON PAGE 7 OF
THE PROSPECTUS.

THE COLUMN FOR THE ADVISOR CLASS IS DELETED FROM THE MANAGEMENT FEES PAID TABLE
ON PAGE 11 OF THE PROSPECTUS.

THE FOLLOWING REPLACES THE FIRST PARAGRAPH UNDER INVESTING THROUGH A FINANCIAL
INTERMEDIARY ON PAGE 15:

The fund's A, C and R Classes are intended for purchase by participants in
employer-sponsored retirement plans. Additionally, the fund's A, B and C Classes
are intended for persons purchasing shares through FINANCIAL INTERMEDIARIES that
provide various administrative and distribution services. For more information
regarding employer-sponsored retirement plan types, please see BUYING AND
SELLING FUND SHARES in the statement of additional information.





THE FOLLOWING REPLACES THE TABLE ON PAGE 15 OF THE PROSPECTUS:

A CLASS                              B CLASS
--------------------------------------------------------------------------------
Initial sales charge(1)              No initial sales charge
--------------------------------------------------------------------------------
Generally no contingent deferred     Contingent deferred sales charge
sales charge(2)                      on redemptions within six years
--------------------------------------------------------------------------------
12b-1 fee of 0.25%                   12b-1 fee of 1.00%
--------------------------------------------------------------------------------
No conversion feature                Convert to A Class shares eight
                                     years after purchase
--------------------------------------------------------------------------------
Generally more appropriate           Purchases generally limited to investors
for long-term investors              whose aggregate investments in American
                                     Century funds are less than $50,000;
                                     generally offered through financial
                                     intermediaries(3)
--------------------------------------------------------------------------------

C CLASS                                    R CLASS
--------------------------------------------------------------------------------
No initial sales charge                    No initial sales charge
--------------------------------------------------------------------------------
Contingent deferred sales charge           No contingent deferred sales charge
on redemptions within 12 months
--------------------------------------------------------------------------------
12b-1 fee of 1.00%                         12b-1 fee of 0.50%
--------------------------------------------------------------------------------
No conversion feature                      No conversion feature
--------------------------------------------------------------------------------
Purchases generally limited to investors   Generally offered through
whose aggregate investments in American    employer-sponsored retirement plans
Century funds are less than $1,000,000;    and other fee-based arrangements(4)
generally more appropriate for
short-term investors
--------------------------------------------------------------------------------

(1)  THE SALES CHARGE FOR A CLASS SHARES DECREASES DEPENDING ON THE SIZE OF
     YOUR INVESTMENT, AND MAY BE WAIVED FOR SOME PURCHASES. THERE IS NO SALES
     CHARGE FOR PURCHASES OF $1,000,000 OR MORE.

(2)  A CONTINGENT DEFERRED SALES CHARGE (CDSC) OF 1.00% WILL BE CHARGED ON
     CERTAIN PURCHASES OF $1,000,000 OR MORE THAT ARE REDEEMED WITHIN ONE YEAR
     OF PURCHASE.

(3)  INVESTORS IN SIMPLE IRA PLANS, SEP IRA PLANS AND SARSEP PLANS
     ESTABLISHED PRIOR TO AUGUST 1, 2006, MAY MAKE ADDITIONAL PURCHASES. THIS
     CLASS IS NOT AVAILABLE FOR NEW EMPLOYER-SPONSORED RETIREMENT PLAN ACCOUNTS.

(4)  IRA ACCOUNTS IN R CLASS SHARES ESTABLISHED THROUGH FINANCIAL
     INTERMEDIARIES PRIOR TO AUGUST 1, 2006, MAY MAKE ADDITIONAL PURCHASES.

THE FOLLOWING REPLACES THE REDUCTIONS AND WAIVERS OF SALES CHARGES FOR A CLASS
SECTION ON PAGES 16 AND 17 OF THE PROSPECTUS:

Reductions and Waivers of Sales Charges for A Class

You may qualify for a reduction or waiver of certain sales charges, but you or
your financial professional must provide certain information, including the
account numbers of any accounts to be aggregated, to American Century at the
time of purchase in order to take advantage of such reduction or waiver. If you
hold assets among multiple intermediaries, it is your responsibility to inform
your intermediary and/or American Century at the time of purchase of any
accounts to be aggregated.

You and your immediate family (your spouse and your children under the age of
21) may combine investments in any share class of any American Century fund
(excluding 529 account assets and certain assets in money market accounts) to
reduce your A Class sales charge in the following ways:

ACCOUNT AGGREGATION. Investments made by you and your immediate family may be
aggregated at each account's current market value if made for your own
account(s) and/or certain other accounts, such as:

*  Certain trust accounts

*  Solely controlled business accounts

*  Single-participant retirement plans

*  Endowments or foundations established and controlled by you or an
   immediate family member

For purposes of aggregation, only investments made through individual-level
accounts may be combined. Assets held in multiple participant employer-sponsored
retirement plans may be aggregated at a plan level.

CONCURRENT PURCHASES. You may combine simultaneous purchases in any share class
of any American Century fund to qualify for a reduced A Class sales charge.


------
2


RIGHTS OF ACCUMULATION. You may take into account the current value of your
existing holdings, less any commissionable shares in the money market funds, in
any share class of any American Century fund to qualify for a reduced A Class
sales charge.

LETTER OF INTENT. A Letter of Intent allows you to combine all non-money market
fund purchases of any share class of any American Century fund you intend to
make over a 13-month period to determine the applicable sales charge. At your
request, existing holdings may be combined with new purchases and sales charge
amounts may be adjusted for purchases made within 90 days prior to our receipt
of the Letter of Intent. Capital appreciation, capital gains and reinvested
dividends earned during the Letter of Intent period do not apply toward its
completion. A portion of your account will be held in escrow to cover additional
A Class sales charges that will be due if your total investments over the
13-month period do not qualify for the applicable sales charge reduction.

WAIVERS FOR CERTAIN INVESTORS. The sales charge on A Class shares may be waived
for:

*  Purchases by registered representatives and other employees of certain
   financial intermediaries (and their immediate family members) having selling
   agreements with the advisor or distributor

*  Broker-dealer sponsored wrap program accounts and/or fee-based accounts
   maintained for clients of certain financial intermediaries who have entered
   into selling agreements with American Century

*  Present or former officers, directors and employees (and their families)
   of American Century

*  Employer-sponsored retirement plan purchases. For plans under $1 million
   in assets, purchases with sales charges are allowed, but may be subject to
   the retirement plan recordkeeper's policies. Refer to BUYING AND SELLING FUND
   SHARES in the statement of additional information

*  IRA Rollovers from any American Century fund held in an employer-sponsored
   retirement plan

*  Shares purchased in accounts that held Advisor Class shares of this fund
   prior to September 4, 2007

*  Certain other investors as deemed appropriate by American Century

THE FOLLOWING IS ADDED AS THE LAST PARAGRAPH UNDER THE B CLASS SECTION ON PAGE
17 OF THE PROSPECTUS:

American Century generally limits purchases of B Class shares to investors whose
aggregate investments in American Century funds are less than $50,000. However,
it is your responsibility to inform your financial intermediary and/or American
Century at the time of purchase of any accounts to be aggregated, including
investments in any share class of any American Century fund (excluding 529
account assets and certain assets in money market accounts) in accounts held by
you and your immediate family members (your spouse and children under the age of
21). Once you reach this limit, you should work with your financial intermediary
to determine what share class is most appropriate for additional purchases.

THE FOLLOWING IS ADDED AS THE LAST PARAGRAPH UNDER THE C CLASS SECTION ON PAGE
18 OF THE PROSPECTUS:

American Century generally limits purchases of C Class shares to investors whose
aggregate investments in American Century funds are less than $1,000,000.
However, it is your responsibility to inform your financial intermediary and/or
American Century at the time of purchase of any accounts to be aggregated,
including investments in any share class of any American Century fund (excluding
529 account assets and certain assets in money market accounts) in accounts held
by you and your immediate family members (your spouse and children under the age
of 21). Once you reach this limit, you should work with your financial
intermediary to determine what share class is most appropriate for additional
purchases.

THE FOLLOWING REPLACES THE SECOND TO THE LAST BULLET UNDER THE CDSC WAIVERS
SECTION ON PAGE 18 OF THE PROSPECTUS:

*  IRA Rollovers from any American Century fund held in an employer-sponsored
   retirement plan, for A Class shares only


THE FOLLOWING REPLACES THE FIRST SENTENCE UNDER REINSTATEMENT PRIVILEGE ON PAGE
18 OF THE PROSPECTUS:

Within 90 days of a redemption of any A or B Class shares, you may reinvest all
of the redemption proceeds in A Class shares of any American Century fund at the
then-current net asset value without paying an initial sales charge.

THE FOLLOWING REPLACES THE FIRST SENTENCE UNDER EXCHANGING SHARES ON PAGE 19 OF
THE PROSPECTUS:

You may exchange shares of the fund for shares of the same class of another
American Century fund without a sales charge if you meet the following criteria:




ALL REFERENCES TO THE ADVISOR CLASS UNDER THE EXCHANGING SHARES SECTION ON PAGE
19, THE REDEMPTIONS SECTION ON PAGE 20 AND THE REDEMPTION OF SHARES IN ACCOUNTS
BELOW MINIMUM SECTION ON PAGE 22 OF THE PROSPECTUS ARE DELETED.

THE FOLLOWING REPLACES THE THIRD PARAGRAPH UNDER REDEMPTIONS ON PAGE 21 OF THE
PROSPECTUS:

If you sell B, C or, in certain cases, A Class shares, you may pay a sales
charge, depending on how long you have held your shares, as described above.

THE FOLLOWING REPLACES THE FIRST PARAGRAPH UNDER MULTIPLE CLASS INFORMATION ON
PAGE 29 OF THE PROSPECTUS:

American Century offers the following classes of the fund: Investor Class,
Institutional Class, A Class, B Class, C Class and R Class.

THE FOLLOWING REPLACES THE FIRST PARAGRAPH OF THE SERVICE, DISTRIBUTION AND
ADMINISTRATIVE FEES SECTION ON PAGE 29 OF THE PROSPECTUS:

Service, Distribution and Administrative Fees

Investment Company Act Rule 12b-1 permits mutual funds that adopt a written plan
to pay certain expenses associated with the distribution of their shares out of
fund assets. Each class, except the Investor Class and Institutional Class,
offered by this prospectus has a 12b-1 plan. The plans provide for the fund to
pay annual fees of 0.25% for A Class, 1.00% for B and C Class, and 0.50% for R
Class to the distributor for distribution and individual shareholder
services, including past distribution services. The distributor pays all or a
portion of such fees to the financial intermediaries that make the classes
available. Because these fees may be used to pay for services that are not
related to prospective sales of the fund, each class will continue to make
payments under its plan even if it is closed to new investors. Because these
fees are paid out of the fund's assets on an ongoing basis, over time these
fees will increase the cost of your investment and may cost you more than
other types of sales charges. The higher fees for B and C Class shares may cost
you more over time than paying the initial sales charge for A Class shares.
For additional information about the plans and their terms, see MULTIPLE
CLASS STRUCTURE in the statement of additional information.


THE FOLLOWING CHANGES ARE EFFECTIVE AUGUST 3, 2007.

THE FOLLOWING REPLACES THE SECOND PARAGRAPH OF THE SERVICE, DISTRIBUTION AND
ADMINISTRATIVE FEES SECTION ON PAGE 30 OF THE PROSPECTUS:

Certain financial intermediaries perform recordkeeping and administrative
services for their clients that would otherwise be performed by American
Century's transfer agent. In some circumstances, the advisor will pay such
service providers a fee for performing those services. Also, the advisor and the
fund's distributor may make payments to intermediaries for various additional
services, other expenses and/or the intermediaries' distribution of the fund out
of their profits or other available sources. Such payments may be made for one
or more of the following: (1) distribution, which may include expenses incurred
by intermediaries for their sales activities with respect to the fund, such as
preparing, printing and distributing sales literature and advertising materials
and compensating registered representatives or other employees of such financial
intermediaries for their sales activities, as well as the opportunity for the
fund to be made available by such intermediaries; (2) shareholder services, such
as providing individual and custom investment advisory services to clients of
the financial intermediaries; and (3) marketing and promotional services,
including business planning assistance, educating personnel about the fund, and
sponsorship of sales meetings, which may include covering costs of providing
speakers, meals and other entertainment. The distributor may sponsor seminars
and conferences designed to educate intermediaries about the fund and may cover
the expenses associated with attendance at such meetings, including travel
costs. These payments and activities are intended to provide an incentive to
intermediaries to sell the fund by educating them about the fund and helping
defray the costs associated with offering the fund. The amount of any payments
described by this paragraph is determined by the advisor or the distributor, and
all such amounts are paid out of the available assets of the advisor and
distributor, and not by you or the fund. As a result, the total expense ratio of
the fund will not be affected by any such payments.

American Century Investment Services, Inc., Distributor

©2007 American Century Proprietary Holdings, Inc. All rights reserved.

The American Century Investments logo, American Century and American Century
Investments are service marks of American Century Proprietary Holdings, Inc.

SH-SPL-55515 0708












American Century World Mutual Funds, Inc.

PROSPECTUS SUPPLEMENT

EMERGING MARKETS FUND

Supplement dated August 3, 2007 * Prospectus dated April 1, 2007

SPECIAL MEETING OF SHAREHOLDERS

At a Special Meeting of Shareholders held July 27, 2007, shareholders of the
fund approved a change to the Advisor Class fee structure. The change will
result in a decrease of 25 basis points (0.25%) in the Rule 12b-1 fee and a
simultaneous increase of 25 basis points in the unified management fee,
resulting in no change to the total expense ratio of the class. In addition, the
fund's Advisor Class will be renamed A Class and will become subject to a
maximum 5.75% front-end sales load.

THE FOLLOWING CHANGES ARE EFFECTIVE SEPTEMBER 4, 2007.

THE FOLLOWING REPLACES THE ADVISOR CLASS AVERAGE ANNUAL TOTAL RETURNS TABLE ON
PAGE 5 OF THE PROSPECTUS:

A CLASS(1)
FOR THE CALENDAR YEAR ENDED DECEMBER 31, 2006  1 YEAR  5 YEARS  LIFE OF CLASS(2)
--------------------------------------------------------------------------------
Return Before Taxes                            34.06%  22.46%   14.14%
MSCI EM Index                                  32.59%  26.97%   15.13%(3)
   (reflects no deduction
   for fees, expenses or taxes)
--------------------------------------------------------------------------------

(1)  PRIOR TO SEPTEMBER 4, 2007, THE A CLASS WAS REFERRED TO AS THE ADVISOR
     CLASS. PERFORMANCE PRIOR TO THAT DATE HAS BEEN RESTATED TO REFLECT THE A
     CLASS SALES CHARGE.

(2)  THE INCEPTION DATE FOR THE A CLASS IS MAY 12, 1999.

(3)  SINCE APRIL 30, 1999, THE DATE CLOSEST TO THE CLASS'S INCEPTION FOR
     WHICH DATA IS AVAILABLE.

THE FOLLOWING REPLACES THE FEES AND EXPENSES SECTION ON PAGES 6 AND 7 OF THE
PROSPECTUS:

FEES AND EXPENSES

The following tables describe the fees and expenses you may pay if you buy and
hold shares of the fund.

SHAREHOLDER FEES (FEES PAID DIRECTLY FROM YOUR INVESTMENT)
                             INVESTOR    INSTITUTIONAL   A          C
                             CLASS       CLASS           CLASS      CLASS
----------------------------------------------------------------------------
Maximum Sales Charge         None        None            5.75%      None
(Load) Imposed
on Purchases
   (as a percentage
   of offering  price)
----------------------------------------------------------------------------
Maximum Deferred             None        None            None(1)    1.00%(2)
Sales Charge (Load)
   (the lower of
   the original
   offering price or
   redemption proceeds
   for A and C Class
   shares)
----------------------------------------------------------------------------
Redemption/Exchange Fee      2.00%(3)    2.00%(3)        None       None
   (as a percentage
   of amount
   redeemed/exchanged)
----------------------------------------------------------------------------
Maximum Account              $25(4)      None            None       None
Maintenance Fee
----------------------------------------------------------------------------

(1)  INVESTMENTS OF $1 MILLION OR MORE IN A CLASS SHARES MAY BE SUBJECT TO
     A CONTINGENT DEFERRED SALES CHARGE OF 1.00% IF THE SHARES ARE REDEEMED
     WITHIN ONE YEAR OF THE DATE OF PURCHASE.

(2)  THE DEFERRED SALES CHARGE IS CONTINGENT ON THE LENGTH OF TIME YOU HAVE
     OWNED YOUR SHARES. THE CHARGE IS 1.00% DURING THE FIRST YEAR AFTER PURCHASE
     AND IS ELIMINATED THEREAFTER.

(3)  APPLIES TO SHARES HELD FOR LESS THAN 180 DAYS. THE FEE DOES NOT APPLY
     TO SHARES PURCHASED THROUGH REINVESTED DIVIDENDS OR CAPITAL GAINS.

(4)  APPLIES ONLY TO INVESTORS WHOSE TOTAL ELIGIBLE INVESTMENTS WITH
     AMERICAN CENTURY ARE LESS THAN $10,000. SEE Account Maintenance Fee UNDER
     Investing Directly with American Century FOR MORE DETAILS.





ANNUAL FUND OPERATING EXPENSES (EXPENSES THAT ARE DEDUCTED FROM FUND ASSETS)
                              DISTRIBUTION                  TOTAL ANNUAL
                 MANAGEMENT   AND SERVICE      OTHER        FUND OPERATING
                 FEE(1)       (12B-1) FEES(2)  EXPENSES(3)  EXPENSES
--------------------------------------------------------------------------------
Investor         1.79%        None             0.01%        1.80%
Class
--------------------------------------------------------------------------------
Institutional    1.59%        None             0.01%        1.60%
Class
--------------------------------------------------------------------------------
A Class          1.79%(4)     0.25%(5)         0.01%        2.05%
--------------------------------------------------------------------------------
C Class          1.79%        1.00%            0.01%        2.80%
--------------------------------------------------------------------------------

(1)  THE FUND PAYS THE ADVISOR A SINGLE, UNIFIED MANAGEMENT FEE FOR
     ARRANGING ALL SERVICES NECESSARY FOR THE FUND TO OPERATE. THE FEE SHOWN IS
     BASED ON ASSETS DURING THE FUND'S MOST RECENT FISCAL YEAR. THE FUND HAS A
     STEPPED FEE SCHEDULE. AS A RESULT, THE FUND'S UNIFIED MANAGEMENT FEE RATE
     GENERALLY DECREASES AS FUND ASSETS INCREASE AND INCREASES AS FUND ASSETS
     DECREASE. FOR MORE INFORMATION ABOUT THE UNIFIED MANAGEMENT FEE, SEE The
     Investment Advisor UNDER Management.

(2)  THE 12B-1 FEE IS DESIGNED TO PERMIT INVESTORS TO PURCHASE SHARES
     THROUGH BROKER-DEALERS, BANKS, INSURANCE COMPANIES AND OTHER FINANCIAL
     INTERMEDIARIES. THE FEE MAY BE USED TO COMPENSATE SUCH FINANCIAL
     INTERMEDIARIES FOR DISTRIBUTION AND OTHER SHAREHOLDER SERVICES. FOR MORE
     INFORMATION, SEE Multiple Class Information and Service, Distribution and
     Administrative Fees, PAGE 24.

(3)  OTHER EXPENSES INCLUDE THE FEES AND EXPENSES OF THE FUND'S INDEPENDENT
     DIRECTORS AND THEIR LEGAL COUNSEL, AS WELL AS INTEREST. OTHER EXPENSES ALSO
     INCLUDE FEES AND EXPENSES INCURRED INDIRECTLY BY THE FUND AS A RESULT OF
     INVESTMENT IN SHARES OF ONE OR MORE MUTUAL FUNDS, HEDGE FUNDS, PRIVATE
     EQUITY FUNDS OR OTHER POOLED INVESTMENT VEHICLES.

(4)  THE UNIFIED MANAGEMENT FEE HAS BEEN RESTATED TO REFLECT THE INCREASE
     IN THE FEE APPROVED BY THE FUND'S SHAREHOLDERS EFFECTIVE SEPTEMBER 4, 2007.

(5)  THE 12B-1 FEE HAS BEEN RESTATED TO REFLECT THE DECREASE IN THE FEE
     EFFECTIVE SEPTEMBER 4, 2007.

EXAMPLE

The examples in the table below are intended to help you compare the costs of
investing in the fund with the costs of investing in other mutual funds. Of
course, your actual costs may be higher or lower. Assuming you . . .

*  invest $10,000 in the fund

*  redeem all of your shares at the end of the periods shown below

*  earn a 5% return each year

*  incur the same operating expenses as shown above

. . . your cost of investing in the fund would be:

                          1 YEAR        3 YEARS        5 YEARS        10 YEARS
--------------------------------------------------------------------------------
Investor Class            $182          $563           $968           $2,098
--------------------------------------------------------------------------------
Institutional Class       $162          $502           $866           $1,886
--------------------------------------------------------------------------------
A Class                   $770          $1,176         $1,607         $2,796
--------------------------------------------------------------------------------
C Class                   $280          $859           $1,463         $3,088
--------------------------------------------------------------------------------

THE FOLLOWING REPLACES THE TABLE ON PAGE 10 OF THE PROSPECTUS:

MANAGEMENT FEES PAID BY THE
FUND TO THE ADVISOR AS A
PERCENTAGE OF AVERAGE NET
ASSETS FOR THE FISCAL YEAR ENDED   INVESTOR    INSTITUTIONAL    A         C
NOVEMBER 30, 2006                  CLASS       CLASS            CLASS(1)  CLASS
--------------------------------------------------------------------------------
Emerging Markets                   1.79%       1.59%            1.54%     1.79%
--------------------------------------------------------------------------------

(1)  PRIOR TO SEPTEMBER 4, 2007, THE A CLASS WAS REFERRED TO AS THE ADVISOR
     CLASS. FOLLOWING THAT DATE, THE MANAGEMENT FEE PAID ANNUALLY TO THE ADVISOR
     IS EXPECTED TO BE 1.79% AS A PERCENTAGE OF AVERAGE NET ASSETS.


------
2


THE FOLLOWING REPLACES THE INVESTING THROUGH A FINANCIAL INTERMEDIARY SECTION ON
PAGES 14 AND 15 OF THE PROSPECTUS:

INVESTING THROUGH A FINANCIAL INTERMEDIARY

The fund's A and C Classes are intended for purchase by participants in
employer-sponsored retirement plans and for persons purchasing shares through
FINANCIAL INTERMEDIARIES that provide various administrative and distribution
services. For more information regarding employer-sponsored retirement plan
types, please see BUYING AND SELLING FUND SHARES in the statement of additional
information.

[GRAPHIC OF TRIANGLE]

FINANCIAL INTERMEDIARIES INCLUDE BANKS, BROKER-DEALERS, INSURANCE
COMPANIES, PLAN SPONSORS AND FINANCIAL PROFESSIONALS.

Although each class of shares represents an interest in the same fund, each has
a different cost structure, as described below. Which class is right for you
depends on many factors, including how long you plan to hold the shares, how
much you plan to invest, the fee structure of each class, and how you wish to
compensate your financial professional for the services provided to you. Your
financial professional can help you choose the option that is most appropriate.

The following table provides a summary description of these classes.

A CLASS                                       C CLASS
--------------------------------------------------------------------------------
Initial sales charge(1)                       No initial sales charge
--------------------------------------------------------------------------------
Generally no contingent                       Contingent deferred sales charge
deferred sales charge(2)                      on redemptions within 12 months
--------------------------------------------------------------------------------
12b-1 fee of 0.25%                            12b-1 fee of 1.00%
--------------------------------------------------------------------------------
No conversion feature                         No conversion feature
--------------------------------------------------------------------------------
Generally more appropriate                    Purchases generally limited to
for long-term investors                       investors whose aggregate
                                              investments in American Century
                                              funds are less than $1,000,000;
                                              generally more appropriate for
                                              short-term investors
--------------------------------------------------------------------------------

(1)  THE SALES CHARGE FOR A CLASS SHARES DECREASES DEPENDING ON THE SIZE OF
     YOUR INVESTMENT, AND MAY BE WAIVED FOR SOME PURCHASES. THERE IS NO SALES
     CHARGE FOR PURCHASES OF $1,000,000 OR MORE.

(2)  A CONTINGENT DEFERRED SALES CHARGE (CDSC) OF 1.00% WILL BE CHARGED ON
     CERTAIN PURCHASES OF $1,000,000 OR MORE THAT ARE REDEEMED WITHIN ONE YEAR
     OF PURCHASE.

CALCULATION OF SALES CHARGES

The information regarding sales charges provided herein is included free of
charge and in a clear and prominent format at americancentury.com in the
INVESTORS USING ADVISORS and INVESTMENT PROFESSIONALS portions of the Web site.
From the description of A or C Class shares, a hyperlink will take you directly
to this disclosure.

A Class

A Class shares are sold at their offering price, which is net asset value plus
an initial sales charge. This sales charge varies depending on the amount of
your investment, and is deducted from your purchase before it is invested. The
sales charges and the amounts paid to your financial professional are:

                                                                AMOUNT PAID
                                                                TO FINANCIAL
                           SALES CHARGE      SALES CHARGE       ADVISOR AS A
                           AS A % OF         AS A % OF NET      % OF OFFERING
PURCHASE AMOUNT            OFFERING PRICE    AMOUNT INVESTED    PRICE
--------------------------------------------------------------------------------
Less than $50,000          5.75%             6.10%              5.00%
--------------------------------------------------------------------------------
$50,000 - $99,999          4.75%             4.99%              4.00%
--------------------------------------------------------------------------------
$100,000 - $249,999        3.75%             3.90%              3.25%
--------------------------------------------------------------------------------
$250,000 - $499,999        2.50%             2.56%              2.00%
--------------------------------------------------------------------------------
$500,000 - $999,999        2.00%             2.04%              1.75%
--------------------------------------------------------------------------------
$1,000,000 - $3,999,999    0.00%             0.00%              1.00%(1)
--------------------------------------------------------------------------------
$4,000,000 - $9,999,999    0.00%             0.00%              0.50%(1)
--------------------------------------------------------------------------------
$10,000,000 or more        0.00%             0.00%              0.25%(1)
--------------------------------------------------------------------------------

(1)  FOR PURCHASES OVER $1,000,000 BY EMPLOYER-SPONSORED RETIREMENT PLANS,
     NO UPFRONT AMOUNT WILL BE PAID TO FINANCIAL PROFESSIONALS.


------
3


There is no front-end sales charge for purchases of $1,000,000 or more, but if
you redeem your shares within one year of purchase you will pay a 1.00% deferred
sales charge, subject to the exceptions listed below. No sales charge applies to
reinvested dividends.

Reductions and Waivers of Sales Charges for A Class

You may qualify for a reduction or waiver of certain sales charges, but you or
your financial professional must provide certain information, including the
account numbers of any accounts to be aggregated, to American Century at the
time of purchase in order to take advantage of such reduction or waiver. If you
hold assets among multiple intermediaries, it is your responsibility to inform
your intermediary and/or American Century at the time of purchase, of any
accounts to be aggregated.

You and your immediate family (your spouse and your children under the age of
21) may combine investments in any share class of any American Century fund
(excluding 529 account assets and certain assets in money market accounts) to
reduce your A Class sales charge in the following ways:

ACCOUNT AGGREGATION. Investments made by you and your immediate family may be
aggregated at each account's current market value if made for your own
account(s) and/or certain other accounts, such as:

*  Certain trust accounts

*  Solely controlled business accounts

*  Single-participant retirement plans

*  Endowments or foundations established and controlled by you or an
   immediate family member

For purposes of aggregation, only investments made through individual-level
accounts may be combined. Assets held in multiple participant employer-sponsored
retirement plans may be aggregated at a plan level.

CONCURRENT PURCHASES. You may combine simultaneous purchases in any share class
of any American Century fund to qualify for a reduced A Class sales charge.

RIGHTS OF ACCUMULATION. You may take into account the current value of your
existing holdings, less any commissionable shares in the money market funds, in
any share class of any American Century fund to qualify for a reduced A Class
sales charge.

LETTER OF INTENT. A Letter of Intent allows you to combine all non-money market
fund purchases of any share class of any American Century fund you intend to
make over a 13-month period to determine the applicable sales charge. At your
request, existing holdings may be combined with new purchases and sales charge
amounts may be adjusted for purchases made within 90 days prior to our receipt
of the Letter of Intent. Capital appreciation, capital gains and reinvested
dividends earned during the Letter of Intent period do not apply toward it
completion. A portion of your account will be held in escrow to cover additional
A Class sales charges that will be due if your total investments over the
13-month period do not qualify for the applicable sales charge reduction.

WAIVERS FOR CERTAIN INVESTORS. The sales charge on A Class shares may be waived
for:

*  Purchases by registered representatives and other employees of certain
   financial intermediaries (and their immediate family members) having selling
   agreements with the advisor or distributor

*  Broker-dealer sponsored wrap program accounts and/or fee-based accounts
   maintained for clients of certain financial intermediaries who have entered
   into selling agreements with American Century

*  Present or former officers, directors and employees (and their families)
   of American Century

*  Employer-sponsored retirement plan purchases. For plans under $1 million
   in assets, purchases with sales charges are allowed, but may be subject to
   the retirement plan recordkeeper's policies. Refer to BUYING AND SELLING FUND
   SHARES in the statement of additional information

*  IRA Rollovers from any American Century fund held in an employer-sponsored
   retirement plan

*  Shares purchased in accounts that held Advisor Class shares of this fund
   prior to September 4, 2007

*  Certain other investors as deemed appropriate by American Century


------
4


C Class

C Class shares are sold at their net asset value without an initial sales
charge. For sales of C Class shares, the amount paid to your financial
professional is 1.00% of the amount invested. If you redeem your shares within
12 months of purchase, you will pay a CDSC of 1.00% of the original purchase
price or the current market value at redemption, whichever is less. The purpose
of the CDSC is to permit the fund's distributor to recoup all or a portion of
the up-front payment made to your financial professional.

The CDSC will not be charged on shares acquired through reinvestment of
dividends or distributions or increases in the net asset value of shares.

American Century generally limits purchases of C Class shares to investors whose
aggregate investments in American Century funds are less than $1,000,000.
However, it is your responsibility to inform your financial intermediary and/or
American Century at the time of purchase of any accounts to be aggregated,
including investments in any share class of any American Century fund (excluding
529 account assets and certain assets in money market accounts) in accounts held
by you and your immediate family members (your spouse and children under the age
of 21). Once you reach this limit, you should work with your financial
intermediary to determine what share class is most appropriate for additional
purchases.

CALCULATION OF CONTINGENT DEFERRED SALES CHARGE (CDSC)

To minimize the amount of the CDSC you may pay when you redeem shares, the fund
will first redeem shares acquired through reinvested dividends and capital gain
distributions, which are not subject to a CDSC. Shares that have been in your
account long enough that they are not subject to a CDSC are redeemed next. For
any remaining redemption amount, shares will be sold in the order they were
purchased (earliest to latest).

CDSC WAIVERS

Any applicable CDSC may be waived in the following cases:

*  redemptions through systematic withdrawal plans not exceeding annually:
   12% of the lesser of the original purchase cost or current market value for A
   and C Class shares

*  distributions from IRAs due to attainment of age 59-1/2 for A Class shares
   and for C Class shares

*  required minimum distributions from retirement accounts upon reaching age
   70-1/2

*  tax-free returns of excess contributions to IRAs

*  redemptions due to death or post-purchase disability

*  exchanges, unless the shares acquired by exchange are redeemed within the
   original CDSC period

*  IRA Rollovers from any American Century fund held in an employer-sponsored
   retirement plan, for A Class shares only

*  if no broker was compensated for the sale

REINSTATEMENT PRIVILEGE

Within 90 days of a redemption of any A Class shares, you may reinvest all of
the redemption proceeds in A Class shares of any American Century fund at the
then-current net asset value without paying an initial sales charge. At your
request, any CDSC you paid on an A Class redemption that you are reinvesting
will be credited to your account. You or your financial professional must notify
the fund's transfer agent in writing at the time of the reinvestment to take
advantage of this privilege, and you may use it only once per account. This
privilege applies only if the new account is owned by the original account
owner.

EXCHANGING SHARES

You may exchange shares of the fund for shares of the same class of another
American Century fund without a sales charge if you meet the following criteria:

*  The exchange is for a minimum of $100

*  For an exchange that opens a new account, the amount of the exchange must
   meet or exceed the minimum account size requirement for the fund receiving
   the exchange

For purposes of computing any applicable CDSC on shares that have been
exchanged, the holding period will begin as of the date of purchase of the
original fund owned. Exchanges from a money market fund are subject to a sales
charge on the fund being purchased, unless the money market fund shares were
acquired by exchange from a fund with a sales charge or by reinvestment of
dividends or capital gains distributions.


------
5


BUYING AND SELLING SHARES

Your ability to purchase, exchange, redeem and transfer shares will be affected
by the policies of the financial intermediary through which you do business.
Some policy differences may include

*  minimum investment requirements

*  exchange policies

*  fund choices

*  cutoff time for investments

*  trading restrictions

In addition, your financial intermediary may charge a transaction fee for the
purchase or sale of fund shares. Those charges are retained by the financial
intermediary and are not shared with American Century or the fund. Please
contact your financial intermediary or plan sponsor for a complete description
of its policies. Copies of the fund's annual report, semiannual report and
statement of additional information are available from your financial
intermediary or plan sponsor.

The fund has authorized certain financial intermediaries to accept orders on the
fund's behalf. American Century has selling agreements with these financial
intermediaries requiring them to track the time investment orders are received
and to comply with procedures relating to the transmission of orders. Orders
must be received by the financial intermediary on the fund's behalf before the
time the net asset value is determined in order to receive that day's share
price. If those orders are transmitted to American Century and paid for in
accordance with the selling agreement, they will be priced at the net asset
value next determined after your request is received in the form required by the
financial intermediary.

SEE ADDITIONAL POLICIES AFFECTING YOUR INVESTMENT FOR MORE INFORMATION ABOUT
INVESTING WITH US.

ALL REFERENCES TO THE ADVISOR CLASS UNDER THE REDEMPTIONS SECTION ON PAGE 16 AND
THE REDEMPTION OF SHARES IN ACCOUNTS BELOW MINIMUM SECTION ON PAGE 17 OF THE
PROSPECTUS ARE DELETED.

THE FOLLOWING SENTENCE REPLACES THE THIRD PARAGRAPH OF THE REDEMPTIONS SECTION
ON PAGE 17 OF THE PROSPECTUS:

If you sell C or, in certain cases, A Class shares, you may pay a sales charge,
depending on how long you have held your shares, as described above.

THE FOLLOWING REPLACES THE FIRST SENTENCE OF THE MULTIPLE CLASS INFORMATION
SECTION ON PAGE 24 OF THE PROSPECTUS:

American Century offers the following classes of shares of the fund: Investor
Class, Institutional Class, A Class and C Class.

THE FOLLOWING REPLACES THE FIRST PARAGRAPH OF THE SERVICE, DISTRIBUTION AND
ADMINISTRATIVE FEES SECTION ON PAGE 24 OF THE PROSPECTUS:

Service, Distribution and Administrative Fees

Investment Company Act Rule 12b-1 permits mutual funds that adopt a written plan
to pay certain expenses associated with the distribution of their shares out of
fund assets. Each class, except the Investor Class and Institutional Class,
offered by this prospectus has a 12b-1 plan. The plans provide for the fund to
pay annual fees of 0.25% for A Class and 1.00% for C Class to the distributor
for distribution and individual shareholder services, including past
distribution services. The distributor pays all or a portion of such fees to the
financial intermediaries that make the classes available. Because these fees may
be used to pay for services that are not related to prospective sales of the
fund, each class will continue to make payments under its plan even if it is
closed to new investors. Because these fees are paid out of the fund's assets on
an ongoing basis, over time these fees will increase the cost of your investment
and may cost you more than paying other types of sales charges. The higher fees
for C Class shares may cost you more over time than paying the initial sales
charge for A Class shares. For additional information about the plans and their
terms, see MULTIPLE CLASS STRUCTURE in the statement of additional information.


------
6


IN THE FINANCIAL HIGHLIGHTS ON PAGE 29 OF THE PROSPECTUS THE REFERENCES TO
ADVISOR CLASS SHOULD BE REPLACED WITH A CLASS.

THE FOLLOWING REPLACES THE TABLE ON THE BACK COVER:

FUND REFERENCE             FUND CODE     TICKER        NEWSPAPER LISTING
--------------------------------------------------------------------------------
Emerging Markets Fund
  Investor Class             043           TWMIX             EmgMkt
--------------------------------------------------------------------------------
  Institutional Class        343           AMKIX             EmgMkt
--------------------------------------------------------------------------------
  A Class                    743           AEMMX             EmgMkt
--------------------------------------------------------------------------------
  C Class                    443           ACECX             EmgMkt
--------------------------------------------------------------------------------

THE FOLLOWING CHANGES ARE EFFECTIVE AUGUST 3, 2007.

THE FOLLOWING REPLACES THE SECOND PARAGRAPH OF THE SERVICE, DISTRIBUTION AND
ADMINISTRATIVE FEES SECTION ON PAGE 24 OF THE PROSPECTUS:

Certain financial intermediaries perform recordkeeping and administrative
services for their clients that would otherwise be performed by American
Century's transfer agent. In some circumstances, the advisor will pay such
service providers a fee for performing those services. Also, the advisor and the
fund's distributor may make payments to intermediaries for various additional
services, other expenses and/or the intermediaries' distribution of the fund out
of their profits or other available sources. Such payments may be made for one
or more of the following: (1) distribution, which may include expenses incurred
by intermediaries for their sales activities with respect to the fund, such as
preparing, printing and distributing sales literature and advertising materials
and compensating registered representatives or other employees of such financial
intermediaries for their sales activities, as well as the opportunity for the
fund to be made available by such intermediaries; (2) shareholder services, such
as providing individual and custom investment advisory services to clients of
the financial intermediaries; and (3) marketing and promotional services,
including business planning assistance, educating personnel about the fund, and
sponsorship of sales meetings, which may include covering costs of providing
speakers, meals and other entertainment. The distributor may sponsor seminars
and conferences designed to educate intermediaries about the fund and may cover
the expenses associated with attendance at such meetings, including travel
costs. These payments and activities are intended to provide an incentive to
intermediaries to sell the fund by educating them about the fund and helping
defray costs associated with offering the fund. The amount of any payments
described by this paragraph is determined by the advisor or the distributor, and
all such amounts are paid out of the available assets of the advisor and
distributor, and not by you or the fund. As a result, the total expense ratio of
the fund will not be affected by any such payments.

American Century Investment Services, Inc., Distributor

©2007 American Century Proprietary Holdings, Inc. All rights reserved.

The American Century Investments logo, American Century and American Century
Investments are service marks of American Century Proprietary Holdings, Inc.

SH-SPL-55506 0708












STATEMENT OF ADDITIONAL INFORMATION SUPPLEMENT

American Century Strategic Asset Allocations, Inc. - SAI dated April 1, 2007
American Century World Mutual Funds, Inc. - SAI dated April 1, 2007
American Century Asset Allocation Portfolios, Inc. - SAI dated December 1, 2006
American Century Growth Funds, Inc. - SAI dated December 1, 2006

Supplement dated August 3, 2007

THE FOLLOWING REPLACES THE INTERESTED DIRECTORS AND INDEPENDENT DIRECTORS TABLES
UNDER MANAGEMENT IN THE STATEMENT OF ADDITIONAL INFORMATION.

Interested Directors
--------------------------------------------------------------------------------
JAMES E. STOWERS, JR., 4500 Main Street, Kansas City, MO 64111

YEAR OF BIRTH: 1924

POSITION(S) HELD WITH FUNDS: Director (since 1958) and Vice Chairman (since
2007)

PRINCIPAL OCCUPATION(S) DURING PAST 5 YEARS: Founder, Co-Chairman, Director and
Controlling Shareholder, ACC; Co-Vice Chairman, ACC (January 2005 to February
2007); Chairman, ACC (January 1995 to December 2004); Director, ACIM, ACGIM,
ACS, ACIS and other ACC subsidiaries

NUMBER OF PORTFOLIOS IN FUND COMPLEX OVERSEEN BY DIRECTOR: 66

OTHER DIRECTORSHIPS HELD BY DIRECTOR: None
--------------------------------------------------------------------------------
JONATHAN S. THOMAS, 4500 Main Street, Kansas City, MO 64111

YEAR OF BIRTH: 1963

POSITION(S) HELD WITH FUNDS: Director (since 2007) and President (since 2007)

PRINCIPAL OCCUPATION(S) DURING PAST 5 YEARS: President and Chief Executive
Officer, ACC (March 2007 to present); Chief Administrative Officer, ACC
(February 2006 to February 2007); Executive Vice President, ACC (November 2005
to February 2007). Also serves as: President, Chief Executive Officer and
Director, ACS; Executive Vice President, ACIM and ACGIM; Director, ACIM, ACGIM,
ACIS and other ACC subsidiaries; Managing Director, MORGAN STANLEY (March 2000
to November 2005)

NUMBER OF PORTFOLIOS IN FUND COMPLEX OVERSEEN BY DIRECTOR: 109

OTHER DIRECTORSHIPS HELD BY DIRECTOR: None
--------------------------------------------------------------------------------

Independent Directors
--------------------------------------------------------------------------------
THOMAS A. BROWN, 4500 Main Street, Kansas City, MO 64111

YEAR OF BIRTH: 1940

POSITION(S) HELD WITH FUNDS: Director (since 1980)

PRINCIPAL OCCUPATION(S) DURING PAST 5 YEARS: Managing Member, ASSOCIATED
INVESTMENTS, LLC (real estate investment company); Managing Member, BROWN
CASCADE PROPERTIES, LLC (real estate investment company); Retired, Area Vice
President, APPLIED INDUSTRIAL TECHNOLOGIES

NUMBER OF PORTFOLIOS IN FUND COMPLEX OVERSEEN BY DIRECTOR: 66

OTHER DIRECTORSHIPS HELD BY DIRECTOR: None
--------------------------------------------------------------------------------
ANDREA C. HALL, PH.D., 4500 Main Street, Kansas City, MO 64111

YEAR OF BIRTH: 1945

POSITION(S) HELD WITH FUNDS: Director (since 1997)

PRINCIPAL OCCUPATION(S) DURING PAST 5 YEARS: Retired, Advisor to the President,
MIDWEST RESEARCH INSTITUTE

NUMBER OF PORTFOLIOS IN FUND COMPLEX OVERSEEN BY DIRECTOR: 66

OTHER DIRECTORSHIPS HELD BY DIRECTOR: None
--------------------------------------------------------------------------------
JAMES A. OLSON, 4500 Main Street, Kansas City, MO 64111

YEAR OF BIRTH: 1942

POSITION(S) HELD WITH FUNDS: Director (since 2007)

PRINCIPAL OCCUPATION(S) DURING PAST 5 YEARS: Member, PLAZA BELMONT LLC, Chief
Financial Officer, PLAZA BELMONT LLC (September 1999 to September 2006)

NUMBER OF PORTFOLIOS IN FUND COMPLEX OVERSEEN BY DIRECTOR: 66

OTHER DIRECTORSHIPS HELD BY DIRECTOR: Director, SAIA, INC. and ENTERTAINMENT
PROPERTIES TRUST
--------------------------------------------------------------------------------
DONALD H. PRATT, 4500 Main Street, Kansas City, MO 64111

YEAR OF BIRTH: 1937

POSITION(S) HELD WITH FUNDS: Director (since 1995) and Chairman of the Board
(since 2005)

PRINCIPAL OCCUPATION(S) DURING PAST 5 YEARS: Chairman and Chief Executive
Officer, WESTERN INVESTMENTS, INC.; Retired Chairman of the Board, BUTLER
MANUFACTURING COMPANY

NUMBER OF PORTFOLIOS IN FUND COMPLEX OVERSEEN BY DIRECTOR: 66

OTHER DIRECTORSHIPS HELD BY DIRECTOR: None
--------------------------------------------------------------------------------
GALE E. SAYERS, 4500 Main Street, Kansas City, MO 64111

YEAR OF BIRTH: 1943

POSITION(S) HELD WITH FUNDS: Director (since 2000)

PRINCIPAL OCCUPATION(S) DURING PAST 5 YEARS: President, Chief Executive Officer
and Founder, SAYERS40, INC., a technology products and services provider

NUMBER OF PORTFOLIOS IN FUND COMPLEX OVERSEEN BY DIRECTOR: 66

OTHER DIRECTORSHIPS HELD BY DIRECTOR: Director, TRIAD HOSPITALS, INC.
--------------------------------------------------------------------------------
M. JEANNINE STRANDJORD, 4500 Main Street, Kansas City, MO 64111

YEAR OF BIRTH: 1945

POSITION(S) HELD WITH FUNDS: Director (since 1994)

PRINCIPAL OCCUPATION(S) DURING PAST 5 YEARS: Retired, formerly Senior Vice
President, SPRINT CORPORATION

NUMBER OF PORTFOLIOS IN FUND COMPLEX OVERSEEN BY DIRECTOR: 66

OTHER DIRECTORSHIPS HELD BY DIRECTOR: Director, DST SYSTEMS, INC.; Director,
EURONET WORLDWIDE, INC.; Director, CHARMING SHOPPES, INC.
--------------------------------------------------------------------------------
TIMOTHY S. WEBSTER, 4500 Main Street, Kansas City, MO 64111

YEAR OF BIRTH: 1961

POSITION(S) HELD WITH FUNDS: Director (since 2001)

PRINCIPAL OCCUPATION(S) DURING PAST 5 YEARS: Managing Director, TDB ACQUISITION
GROUP LLC (September 2006 to present); President and Chief Executive Officer,
AMERICAN ITALIAN PASTA COMPANY (2001 to December 2005)

NUMBER OF PORTFOLIOS IN FUND COMPLEX OVERSEEN BY DIRECTOR: 66

OTHER DIRECTORSHIPS HELD BY DIRECTOR: None
--------------------------------------------------------------------------------

American Century Investment Services, Inc., Distributor

©2007 American Century Proprietary Holdings, Inc. All rights reserved.

The American Century Investments logo, American Century and American Century
Investments are service marks of American Century Proprietary Holdings, Inc.

SH-SPL-56246 0708