Exhibit (d)(xvii)

                       AMENDMENT TO SUBADVISORY AGREEMENT

     This AMENDMENT TO SUBADVISORY AGREEMENT (the "Amendment") is effective as
of January 23, 2006 by and between AIG SUNAMERICA ASSET MANAGEMENT CORP., a
Delaware corporation (the "Adviser"), and J.P. MORGAN INVESTMENT MANAGEMENT
INC., a Delaware corporation (the "Subadviser").

                                   WITNESSETH:

     WHEREAS, the Adviser and SUNAMERICA SERIES TRUST, a Massachusetts business
trust (the "Trust"), have entered into an Investment Advisory and Management
Agreement dated as of January 1, 1999, as amended from time to time (the
"Advisory Agreement"), pursuant to which the Adviser has agreed to provide
investment management, advisory and administrative services to the Trust, and
pursuant to it which the Adviser may delegate one or more of its duties to a
subadviser pursuant to a written subadvisory agreement; and

     WHEREAS, the Adviser and Subadviser are parties to that certain Subadvisory
Agreement dated November 1, 2005 (the "Subadvisory Agreement") with respect to
the Trust; and

     WHEREAS, the parties wish to amend the Subadvisory Agreement as set forth
below; and

     NOW, THEREFORE, for good and valuable consideration, the receipt of which
is hereby acknowledged, the parties agree as follows:

     1. Schedule A to the Subadvisory Agreement is hereby amended to reflect the
     addition of the SunAmerica Series Trust SunAmerica Balanced Portfolio.
     Schedule A is also attached hereto.



                                           Annual Fee
                                (as a percentage of the average
                                daily net assets the Subadviser
Portfolio(s)                       manages in the portfolio)
------------                    -------------------------------
                             
SunAmerica Balanced Portfolio   0.40% on the first $50 million
                                0.30% on the next $100 million
                                0.25% thereafter


     Subadviser shall manage the SunAmerica Balanced Portfolio assets and shall
     be compensated as noted above.

     2. COUNTERPARTS. This Amendment may be executed in two or more
     counterparts, each of which shall be an original and all of which together
     shall constitute one instrument.



     3. FULL FORCE AND EFFECT. Except as expressly supplemented, amended or
     consented to hereby, all of the representations, warranties, terms,
     covenants, and conditions of the Agreement shall remain unchanged and shall
     continue to be in full force and effect.

     4. MISCELLANEOUS. Capitalized terms used but not defined herein shall have
     the meanings assigned to them in the Subadvisory Agreement.

     IN WITNESS WHEREOF, the parties have caused their respective duly
authorized officers to execute this Amendment as of the date first above
written.

AIG SUNAMERICA ASSET MANAGEMENT CORP.   J.P. MORGAN INVESTMENT MANAGEMENT INC.


By: /s/ PETER A. HARBECK                By: /s/ DAVID WARSOFF
    ---------------------------------       ------------------------------------
Name: Peter A. Harbeck                  Name: David Warsoff
Title: President and                    Title: Vice President
       Chief Executive Officer


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                                   SCHEDULE A

                           Effective January 23, 2006



                                           ANNUAL FEE
                                (AS A PERCENTAGE OF THE AVERAGE
                                DAILY NET ASSETS THE SUBADVISER
PORTFOLIO(S)                        MANAGES IN THE PORTFOLIO)
------------                    -------------------------------
                             
Global Equities Portfolio       0.45% on the first $50 million
(Tax ID No. 13-7002447)         0.40% on the next $100 million
                                0.35% on the next $350 million
                                0.30% thereafter

SunAmerica Balanced Portfolio   0.40% on the first $50 million
(Tax ID No. 95-4572884)         0.30% on the next $100 million
                                0.25% thereafter



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