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          <cik>0001317146</cik>
          <ccc>XXXXXXXX</ccc>
        </issuerCredentials>
      </filer>


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        <classId>C000227126</classId>
        <classId>C000227125</classId>
      </seriesClassInfo>


    </filerInfo>
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      <regFileNumber>811-21714</regFileNumber>
      <regCik>0001317146</regCik>
      <regLei>XSZQMOMB2JPNHA01JH98</regLei>
      <regStreet1>1295 State Street</regStreet1>
      <regCity>Springfield</regCity>
      <regStateConditional regCountry="US" regState="US-MA"/>
      <regZipOrPostalCode>01111-0001</regZipOrPostalCode>
      <regPhone>413-744-1000</regPhone>
      <seriesName>MML iShares 60/40 Allocation Fund</seriesName>
      <seriesId>S000071681</seriesId>
      <seriesLei>549300W7UJYWRGTSEC85</seriesLei>
      <repPdEnd>2025-12-31</repPdEnd>
      <repPdDate>2025-06-30</repPdDate>
      <isFinalFiling>N</isFinalFiling>
    </genInfo>
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      <totLiabs>70047.13</totLiabs>
      <netAssets>63254608.85</netAssets>
      <assetsAttrMiscSec>0.00000000</assetsAttrMiscSec>
      <assetsInvested>0.00000000</assetsInvested>
      <amtPayOneYrBanksBorr>0.00000000</amtPayOneYrBanksBorr>
      <amtPayOneYrCtrldComp>0.00000000</amtPayOneYrCtrldComp>
      <amtPayOneYrOthAffil>0.00000000</amtPayOneYrOthAffil>
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      <cshNotRptdInCorD>53194.84000000</cshNotRptdInCorD>
      <isNonCashCollateral>N</isNonCashCollateral>
      <returnInfo>
        <monthlyTotReturns>
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        <fairValLevel>1</fairValLevel>
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          <isCashCollateral>N</isCashCollateral>
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          <isLoanByFund>N</isLoanByFund>
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      </invstOrSec>
      <invstOrSec>
        <name>iShares Core S&amp;P Total U.S. Stock Market ETF</name>
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        <title>iShares Core S&amp;P Total U.S. Stock Market ETF</title>
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        <fairValLevel>1</fairValLevel>
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        <name>iShares Core Dividend Growth ETF</name>
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        <title>iShares Core Dividend Growth ETF</title>
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        <fairValLevel>1</fairValLevel>
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      </invstOrSec>
      <invstOrSec>
        <name>iShares 1-5 Year Investment Grade Corporate Bond ETF</name>
        <lei>549300T14S5IX7V5T008</lei>
        <title>iShares 1-5 Year Investment Grade Corporate Bond ETF</title>
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          <isin value="US4642886463"/>
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        <balance>57050.00000000</balance>
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        <fairValLevel>1</fairValLevel>
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          <isCashCollateral>N</isCashCollateral>
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          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>iShares Core MSCI International Developed Markets ETF</name>
        <lei>549300LRJOM3FVVFKB50</lei>
        <title>iShares Core MSCI International Developed Markets ETF</title>
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          <isin value="US46435G3267"/>
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        <fairValLevel>1</fairValLevel>
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          <isCashCollateral>N</isCashCollateral>
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          <isLoanByFund>N</isLoanByFund>
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      </invstOrSec>
      <invstOrSec>
        <name>iShares Core International Aggregate Bond ETF</name>
        <lei>549300FPQU8XYG8LAX15</lei>
        <title>iShares Core International Aggregate Bond ETF</title>
        <cusip>46435G672</cusip>
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        <balance>5908.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
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        <invCountry>US</invCountry>
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        <fairValLevel>1</fairValLevel>
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          <isCashCollateral>N</isCashCollateral>
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          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>iShares 20+ Year Treasury Bond ETF</name>
        <lei>549300WWURKS1JGBZU59</lei>
        <title>iShares 20+ Year Treasury Bond ETF</title>
        <cusip>464287432</cusip>
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          <isin value="US4642874329"/>
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        <balance>13290.00000000</balance>
        <units>NS</units>
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        <fairValLevel>1</fairValLevel>
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          <isLoanByFund>N</isLoanByFund>
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      </invstOrSec>
      <invstOrSec>
        <name>iShares Core MSCI Emerging Markets ETF</name>
        <lei>5493007C24Z3ZDJ0VD06</lei>
        <title>iShares Core MSCI Emerging Markets ETF</title>
        <cusip>46434G103</cusip>
        <identifiers>
          <isin value="US46434G1031"/>
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        <curCd>USD</curCd>
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        <invCountry>US</invCountry>
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        <fairValLevel>1</fairValLevel>
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          <isCashCollateral>N</isCashCollateral>
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          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>iShares Core S&amp;P Mid-Cap ETF</name>
        <lei>549300ODQWH5PC0IUZ78</lei>
        <title>iShares Core S&amp;P Mid-Cap ETF</title>
        <cusip>464287507</cusip>
        <identifiers>
          <isin value="US4642875078"/>
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        <balance>20345.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1261796.90000000</valUSD>
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        <payoffProfile>Long</payoffProfile>
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        <invCountry>US</invCountry>
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        <fairValLevel>1</fairValLevel>
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          <isCashCollateral>N</isCashCollateral>
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          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>iShares Core S&amp;P 500 ETF</name>
        <lei>5493007M4YMN8XL48C14</lei>
        <title>iShares Core S&amp;P 500 ETF</title>
        <cusip>464287200</cusip>
        <identifiers>
          <isin value="US4642872000"/>
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        <balance>9537.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>5921523.30000000</valUSD>
        <pctVal>9.361410034234</pctVal>
        <payoffProfile>Long</payoffProfile>
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        <invCountry>US</invCountry>
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        <fairValLevel>1</fairValLevel>
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          <isCashCollateral>N</isCashCollateral>
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          <isLoanByFund>N</isLoanByFund>
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      </invstOrSec>
      <invstOrSec>
        <name>iShares Broad USD High Yield Corporate Bond ETF</name>
        <lei>549300X7H67ZLUE3IZ46</lei>
        <title>iShares Broad USD High Yield Corporate Bond ETF</title>
        <cusip>46435U853</cusip>
        <identifiers>
          <isin value="US46435U8532"/>
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        <balance>16336.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>612763.36000000</valUSD>
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        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>RF</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
    </invstOrSecs>
    <explntrNotes>
      <explntrNote note="Monthly returns presented in Item B.5(a) have been calculated without deducting any applicable sales loads or redemption fees." noteItem="B.5.a"/>
    </explntrNotes>
    <signature>
      <ncom:dateSigned>2025-07-28</ncom:dateSigned>
      <ncom:nameOfApplicant>MML Series Investment Fund II</ncom:nameOfApplicant>
      <ncom:signature>Renee Hitchcock</ncom:signature>
      <ncom:signerName>Renee Hitchcock</ncom:signerName>
      <ncom:title>CFO and Treasurer</ncom:title>
    </signature>
  </formData>
</edgarSubmission>
