FIDELITY (LOGO) INVESTMENTS(registered trademark) FMR Corp.
82 Devonshire Street
Boston MA 02109-3614
617 563 7000
February 2, 1999
Securities and Exchange Commission
Judiciary Plaza
450 Fifth Street, N.W.
Washington, D.C. 20549
<TABLE>
<CAPTION>
<S> <C>
Attention: File Room
Re: Fidelity Mt. Vernon Street Trust (the trust):
Fidelity Growth Company Fund
Fidelity Aggressive Growth Fund (formerly Fidelity Emerging Growth Fund)
Fidelity New Millennium Fund (the funds)
File No. 2-79755 and 811-3583
</TABLE>
______________________________________________________________________
Ladies and Gentlemen:
Transmitted herewith pursuant to Rule 497(j) under the Securities Act
of 1933 is certification that the Prospectuses and Statements of
Additional Information with respect to the above referenced funds do
not differ from those filed in the most recent post-effective
amendment, which was filed electronically.
Very truly yours,
/s/Eric D. Roiter
Eric D. Roiter
Secretary