497 1 mftsupp.htm EATON VANCE MUTUAL FUNDS TRUST 497 DTD 5-1-08 mftsupp.htm -- Converted by SEC Publisher, created by BCL Technologies Inc., for SEC Filing

EATON VANCE CASH MANAGEMENT
FUND
EATON VANCE MONEY MARKET FUND
Supplement to Prospectus
dated March 1, 2008

The following replaces the fourth paragraph in
“Management” under “Management and
Organization”:

As of May 1, 2008, Duke E. Laflamme is portfolio manager
of the Cash Management Portfolio. Mr. Laflamme also
manages other Eaton Vance portfolios, has been an Eaton
Vance portfolio manager for over five years and is a Vice
President of Eaton Vance and Boston Management and
Research.

May 1, 2008                                                            MMFPS


EATON VANCE CASH MANAGEMENT FUND

EATON VANCE MONEY MARKET FUND

Supplement to Statement of Additional Information dated March 1, 2008

1. The following replaces the first two sentences of the first paragraph in “Portfolio Manager” under “Investment Advisory and Administrative Services”.

Portfolio Manager. The portfolio manager of the Cash Management Portfolio is Duke E. Laflamme. Mr. Laflamme manages other investment companies and/or investment accounts in addition to the Portfolio.

2. The following replaces the tables in “Portfolio Manager” under “Investment Advisory and Administrative Services”.

    Number of    Total Assets of       Number of Accounts     Total Assets of Accounts 
    All Accounts    All Accounts(1)    Paying a Performance Fee    Paying a Performance Fee(1) 
   Duke E. Laflamme(2)                     
Registered Investment Companies         5     $    748.5                     0                     $0 
Other Pooled Investment Vehicles         0     $         0                     0                     $0 
Other Accounts         3     $       19.702                     0                     $0 

(1)      In millions of dollars. For registered investment companies, assets represent net assets of all open-end investment companies and gross assets of all closed-end investment companies.
 
(2)      As of March 31, 2008.
 
             Aggregate Dollar Range of Equity 
    Dollar Range of Equity Securities    Securities Owned in all Registered Funds in 
Fund Name and Portfolio Manager             Owned in the Fund         the Eaton Vance Family of Funds 
Cash Management Fund(1)         
   Duke E. Laflamme               $1 - $10,000               $100,001 - $500,000 
Money Market Fund(1)         
   Duke E. Laflamme                     None               $100,001 - $500,000 

(1) As of March 31, 2008.

May 1, 2008