AMERICAN CENTURY INVESTMENTS
                                4500 MAIN STREET
                          KANSAS CITY, MISSOURI 64111




October 16, 2006


Securities and Exchange Commission
100 F. Street, N.E.
Washington, DC 20549

RE:  American Century Mutual Funds, Inc.
      1933 Act File No. 2-14213, Post-Effective Amendment No. 119
      1940 Act File No. 811-0816, Amendment No. 119

Ladies and Gentlemen:

     Pursuant to Rule 497(j) under the Securities  Act of 1933, as amended,  the
undersigned  hereby  certifies  that the form of  prospectus  and  statement  of
additional  information that would have been filed under paragraph (b) or (c) of
Rule 497 with respect to the  above-referenced  issuer  would not have  differed
from that contained in the most recent  registration  statement  amendment,  the
text of which has been filed electronically.

     If there are any  questions  or  comments  regarding  this  filing,  please
contact the undersigned at (816) 340-3224.

Sincerely,



/s/ Christine J. Crossley
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Christine J. Crossley
Corporate Counsel