<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information
extracted from MML
form N-SAR for the period ended June 30, 2000
and is qualified in its entirety by reference to
such financial statements.
</LEGEND>
<SERIES>
<NUMBER> 1
<NAME> MML Equity Fund
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-END> JUN-30-2000
<INVESTMENTS-AT-COST> 1,670,176,471
<INVESTMENTS-AT-VALUE> 2,302,327,766
<RECEIVABLES> 30,657,887
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 2,332,985,653
<PAYABLE-FOR-SECURITIES> 18,182,949
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 59,970,411
<TOTAL-LIABILITIES> 78,153,360
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 1,382,598,351
<SHARES-COMMON-STOCK> 64,366,795
<SHARES-COMMON-PRIOR> 75,176,572
<ACCUMULATED-NII-CURRENT> 21,616,248
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 218,466,399
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 632,151,295
<NET-ASSETS> 2,254,832,293
<DIVIDEND-INCOME> 25,388,511
<INTEREST-INCOME> 804,531
<OTHER-INCOME> 0
<EXPENSES-NET> 4,635,524
<NET-INVESTMENT-INCOME> 21,557,518
<REALIZED-GAINS-CURRENT> 218,466,399
<APPREC-INCREASE-CURRENT> (362,291,737)
<NET-CHANGE-FROM-OPS> (122,267,820)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 2,185,402
<NUMBER-OF-SHARES-REDEEMED> 15,350,910
<SHARES-REINVESTED> 2,355,731
<NET-CHANGE-IN-ASSETS> (493,323,040)
<ACCUMULATED-NII-PRIOR> 58,730
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 4,520,975
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 4,635,524
<AVERAGE-NET-ASSETS> 2,469,037,595
<PER-SHARE-NAV-BEGIN> 36.56
<PER-SHARE-NII> 0.34
<PER-SHARE-GAIN-APPREC> (1.87)
<PER-SHARE-DIVIDEND> 0.00
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 35.03
<EXPENSE-RATIO> 0.38
</TABLE>
