MFS(R) INVESTMENT MANAGEMENT
           500 BOYLSTON STREET, BOSTON, MASSACHUSETTS 02116-3741
                                 (617) 954-5000



                                        April 1, 2008


VIA EDGAR
United States Securities & Exchange Commission
100 F Street, N.E.
Washington, DC  20549

     Re:  Massachusetts  Investors  Growth  Stock Fund (the  "Fund")  (File Nos.
          2-14677 and 811-859)

Ladies and Gentlemen:

     Pursuant  to Rule  497(j)  under the  Securities  Act of 1933,  as amended,
please  accept  this  letter  on behalf  of the Fund as  certification  that the
Prospectus  and Statement of Additional  Information  for the Fund do not differ
from those contained in Post-Effective Amendment No. 81 (the "Amendment") to the
Fund's   Registration   Statement  on  Form  N-1A.   The   Amendment  was  filed
electronically on March 27, 2008.

     Please call the  undersigned  at (617)  954-5843  or Jessica  Rung at (617)
954-6149 with any questions you may have.

                                        Very truly yours,


                                        BRIAN E. LANGENFELD
                                        Brian E. Langenfeld
                                        Senior Counsel

BEL/bjn