PROSPECTUS SUPPLEMENT

American Century Asset Allocation Portfolios, Inc.

LIVESTRONG(TM) 2015 PORTFOLIO, LIVESTRONG(TM) 2025 PORTFOLIO, LIVESTRONG(TM)
2035 PORTFOLIO, LIVESTRONG(TM) 2045 PORTFOLIO, LIVESTRONG(TM) INCOME PORTFOLIO

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

THE FOLLOWING REPLACES THE SECOND PARAGRAPH UNDER 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.

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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.

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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