[Ropes & Gray Letterhead]




November 13, 2008



Metropolitan Series Fund, Inc.
501 Boylston Street
Boston, Massachusetts 02116

         Re: Registration Statement on Form N-14


Ladies and Gentlemen:

         We have acted as counsel to Metropolitan Series Fund, Inc. (the
"Company") in connection with the Registration Statement of the Company on Form
N-14 (the "Registration Statement") being filed by the Company under the
Securities Act of 1933, as amended (the "Act"), relating to the proposed
combination of the Legg Mason Partners Managed Assets Portfolio (the "Acquired
Portfolio"), a series of Met Investors Series Trust (the "Trust"), and the
BlackRock Diversified Portfolio (the "Acquiring Portfolio"), a series of the
Company, and the issuance of Class A shares of common stock of the Acquiring
Portfolio in connection therewith (the "Shares"), all in accordance with the
terms of the proposed Agreement and Plan of Reorganization by and among the
Trust on behalf of the Acquired Portfolio and the Company on behalf of the
Acquiring Portfolio (the "Agreement and Plan of Reorganization"), in
substantially the form to be included in the Registration Statement as an
exhibit.

         We have examined the Company's Articles of Incorporation, as amended
and supplemented (collectively, the "Articles"), and the Company's Bylaws, as
amended. We have also examined such other documents and records as we have
deemed necessary for the purposes of this opinion. Additionally, we have assumed
that, as of any date of issuance of the Shares pursuant to the Agreement and
Plan of Reorganization, the number of issued Shares will not exceed the number
of Shares authorized to be issued under the Articles.

         We have assumed for purposes of this opinion that, prior to the date of
the issuance of the Shares, (1) the Trustees of the Trust and the shareholders
of the Acquired Portfolio will have taken all actions required of them for the
approval of the Agreement and Plan of Reorganization and (2) the Agreement and
Plan of Reorganization will have been duly executed and delivered by each party
thereto and will constitute the legal, valid and binding obligation of each of
the Company and the Trust.

         Based upon and subject to the foregoing, we are of the opinion that
when issued and delivered in accordance with the Agreement and Plan of
Reorganization, the Shares will be validly issued, fully paid and non-assessable
by the Company, assuming that as consideration for the Shares not less than the
net asset value and the par value of such Shares has been paid and that the
conditions set forth in the Agreement and Plan of Reorganization have been
satisfied.

         We understand that this opinion is to be used in connection with the
registration of the Shares for offering and sale pursuant to the Act. We consent
to the filing of this opinion with and as part of the Registration Statement and
further consent to the references to our firm in the Registration Statement.

                                                Very truly yours,

                                               /s/ Ropes & Gray LLP
                                               ------------------------
                                                Ropes & Gray LLP