<PAGE> PAGE 1
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007 C020300 MML MANAGED BOND FUND
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007 C020400 MML BLEND FUND
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<PAGE> PAGE 2
020 A000001 CS FIRST BOSTON CORPORATION
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020 A000002 PRUDENTIAL-BACHE SECURITIRS, INC.
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<PAGE> PAGE 3
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<PAGE> PAGE 4
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<PAGE> PAGE 5
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<PAGE> PAGE 6
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<PAGE> PAGE 7
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<PAGE> PAGE 8
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<PAGE> PAGE 9
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<PAGE> PAGE 10
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<PAGE> PAGE 11
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<PAGE> PAGE 12
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<PAGE> PAGE 13
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<PAGE> PAGE 14
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<PAGE> PAGE 15
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<PAGE> PAGE 16
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<PAGE> PAGE 17
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<PAGE> PAGE 18
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<PAGE> PAGE 19
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SIGNATURE STEPHEN L. KUHN
TITLE SECRETARY
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000067160
<NAME> MML SERIES INVESTMENT FUND
<SERIES>
<NUMBER> 1
<NAME> MML EQUITY FUND
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<NUMBER-OF-SHARES-REDEEMED> 1,909,273
<SHARES-REINVESTED> 1,621,795
<NET-CHANGE-IN-ASSETS> 428,115,988
<ACCUMULATED-NII-PRIOR> 0
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<OVERDISTRIB-NII-PRIOR> 9200
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<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000067160
<NAME> MML SERIES INVESTMENT FUND
<SERIES>
<NUMBER> 2
<NAME> MML MONEY MARKET FUND
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> DEC-31-1995
<PERIOD-START> JAN-01-1995
<PERIOD-END> DEC-31-1995
<INVESTMENTS-AT-COST> 109,543,253
<INVESTMENTS-AT-VALUE> 109,543,253
<RECEIVABLES> 497
<ASSETS-OTHER> 2,962
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 109,546,712
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<OTHER-ITEMS-LIABILITIES> 626,511
<TOTAL-LIABILITIES> 626,511
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 107,830,999
<SHARES-COMMON-STOCK> 108,920,201
<SHARES-COMMON-PRIOR> 91,786,033
<ACCUMULATED-NII-CURRENT> 9,734
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (9,734)
<OVERDISTRIBUTION-GAINS> 0
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<NET-ASSETS> 108,920,201
<DIVIDEND-INCOME> 0
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<NET-INVESTMENT-INCOME> 5,460,140
<REALIZED-GAINS-CURRENT> (841)
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<NUMBER-OF-SHARES-SOLD> 92,327,266
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<SHARES-REINVESTED> 5,376,748
<NET-CHANGE-IN-ASSETS> 17,134,168
<ACCUMULATED-NII-PRIOR> 8,893
<ACCUMULATED-GAINS-PRIOR> (8,893)
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</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000067160
<NAME> MML SERIES INVESTMENT FUND
<SERIES>
<NUMBER> 3
<NAME> MML MANAGED BOND FUND
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> DEC-31-1995
<PERIOD-START> JAN-01-1995
<PERIOD-END> DEC-31-1995
<INVESTMENTS-AT-COST> 148,051,745
<INVESTMENTS-AT-VALUE> 154,481,637
<RECEIVABLES> 9,161,076
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<OTHER-ITEMS-LIABILITIES> 2,661,011
<TOTAL-LIABILITIES> 10,584,233
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 152,990,211
<SHARES-COMMON-STOCK> 12,748,690
<SHARES-COMMON-PRIOR> 10,879,319
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 72,567
<ACCUMULATED-NET-GAINS> (776,885)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 6,429,892
<NET-ASSETS> 158,698,138
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<INTEREST-INCOME> 10,026,269
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<NET-INVESTMENT-INCOME> 9,299,421
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<NUMBER-OF-SHARES-SOLD> 2,219,273
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<GROSS-EXPENSE> 726,848
<AVERAGE-NET-ASSETS> 140,227,490
<PER-SHARE-NAV-BEGIN> 11.141
<PER-SHARE-NII> 0.782
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<PER-SHARE-DIVIDEND> 0.782
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<PER-SHARE-NAV-END> 12.448
<EXPENSE-RATIO> 0.52
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000067160
<NAME> MML SERIES INVESTMENT FUND
<SERIES>
<NUMBER> 4
<NAME> MML BLEND FUND
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> DEC-31-1995
<PERIOD-START> JAN-01-1995
<PERIOD-END> DEC-31-1995
<INVESTMENTS-AT-COST> 1,477,928,523
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<ACCUMULATED-NII-CURRENT> 0
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<NUMBER-OF-SHARES-SOLD> 6,885,480
<NUMBER-OF-SHARES-REDEEMED> 4,944,135
<SHARES-REINVESTED> 5,184,192
<NET-CHANGE-IN-ASSETS> 378,879,793
<ACCUMULATED-NII-PRIOR> 2,008
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> (1,032,310)
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<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 6,439,815
<AVERAGE-NET-ASSETS> 1,676,325,622
<PER-SHARE-NAV-BEGIN> 17.672
<PER-SHARE-NII> 0.811
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<EXPENSE-RATIO> 0.38
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<AVG-DEBT-PER-SHARE> 0
</TABLE>
