Sullivan & Worcester LLP                     T 202 775 1200
  1666 K Street, NW                            F 202 293 2275
  Washington, DC 20006                         www.sandw.com


                                                April 6, 2010


VIA EDGAR

EDGAR Operations Branch
Division of Investment Management
Securities and Exchange Commission
100 F Street, N.E.
Washington, DC 20549
Attention:  Ms. Alison White

                  Re:      Met Investors Series Trust
                           Post-Effective Amendment No. 33
                           to the Registration Statement
                           SEC File Nos. 333-48456, 811-10183


Dear Ms. White:

         On behalf of Met Investors Series Trust (the "Registrant"), this letter
supplements our April 2, 2010 letter to you responding to certain oral comments
delivered on March 16, 2010 with respect to Post-Effective Amendment No. 33 to
the Registrant's Registration Statement on Form N-1A (the "Registration
Statement") filed pursuant to Rule 485(a) under the Securities Act of 1933 on
February 9, 2010.

General Comment

1.   Comment: Please include the tax disclosure required by Item 7 of Form N-1A.

     Response:  The  Registrant  has added  the  following  statement  under the
          newly-added heading "Tax Information" in the portfolio summary section
          of each of its series'  prospectuses:  "For information  regarding the
          tax consequences of Contract ownership,  please see the prospectus for
          the relevant Contract."

                                      * * *


The Registrant acknowledges that:

     1.   it is  responsible  for the adequacy and accuracy of the disclosure in
          its filing of the above-referenced Registration Statement;

     2.   staff  comments or changes to disclosure in response to staff comments
          in the filings  reviewed by the staff do not foreclose the  Securities
          and  Exchange  Commission  from taking any action with  respect to the
          filing; and

     3.   the  Registrant  may not  assert  staff  comments  as a defense in any
          proceeding  initiated by the Securities and Exchange Commission or any
          person under the federal securities laws of the United States.

                                     * * *


     If you have any questions, please feel free to call me at (202) 775-1205.

                                                 Very truly yours,

                                                 /s/ Robert N. Hickey
                                                 -----------------------------
                                                 Robert N. Hickey

cc:  John Connolly, Esq.
     Michael Lawlor, Esq.