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      <liveTestFlag>LIVE</liveTestFlag>
      <filer>
        <issuerCredentials>
          <cik>0001264033</cik>
          <ccc>XXXXXXXX</ccc>
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      <flags>
        <returnCopyFlag>false</returnCopyFlag>
        <overrideInternetFlag>false</overrideInternetFlag>
        <confirmingCopyFlag>false</confirmingCopyFlag>
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      <investmentCompanyType>S-6</investmentCompanyType>
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    <generalInfo isReportPeriodLt12="N" reportEndingPeriod="2018-12-31"/>
    <registrantInfo>
      <registrantFullName>TALCOTT RESOLUTION LIFE INSURANCE CO- SEPARATE ACCOUNT TWELVE</registrantFullName>
      <investmentCompFileNo>811-21433</investmentCompFileNo>
      <registrantCik>0001264033</registrantCik>
      <registrantLei>549300D9WMJKKVZA8T06</registrantLei>
      <registrantstreet1>1 Griffin Road North</registrantstreet1>
      <registrantcity>Windsor</registrantcity>
      <registrantzipCode>06095-1512</registrantzipCode>
      <registrantstate>US-CT</registrantstate>
      <registrantcountry>US</registrantcountry>
      <registrantphoneNumber>1-860-547-4390</registrantphoneNumber>
      <websites>
        <website webpage="N/A"/>
      </websites>
      <locationBooksRecords>
        <locationBooksRecord>
          <officeName>Massachusetts Mutual Life Insurance Company, as administrator</officeName>
          <officeAddress1>1295 State Street</officeAddress1>
          <officeCity>Springfield</officeCity>
          <officeStateCountry officeState="US-MA" officeCountry="US"/>
          <officeRecordsZipCode>01111</officeRecordsZipCode>
          <officePhone>860-562-7200</officePhone>
          <booksRecordsDesc>Contract forms, securities agreements, etc.</booksRecordsDesc>
        </locationBooksRecord>
      </locationBooksRecords>
      <isRegistrantFirstFiling>Y</isRegistrantFirstFiling>
      <isRegistrantLastFiling>N</isRegistrantLastFiling>
      <isRegistrantFamilyInvComp>N</isRegistrantFamilyInvComp>
      <registrantClassificationType>S-6</registrantClassificationType>
      <isSecuritiesActRegistration>Y</isSecuritiesActRegistration>
      <chiefComplianceOfficers>
        <chiefComplianceOfficer>
          <ccoName>Lisa Proch</ccoName>
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          <ccoStreet1>1 Griffin Road North</ccoStreet1>
          <ccoCity>Windsor</ccoCity>
          <ccoStateCountry ccoState="US-CT" ccoCountry="US"/>
          <ccoZipCode>06095-1512</ccoZipCode>
          <ccoPhone>XXXXXX</ccoPhone>
          <isCcoChangedSinceLastFiling>N</isCcoChangedSinceLastFiling>
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            <ccoEmployer ccoEmployerName="N/A" ccoEmployerId="N/A"/>
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      <isRegistrantSubmittedMatter>N</isRegistrantSubmittedMatter>
      <isPreviousLegalProceeding>N</isPreviousLegalProceeding>
      <isPreviousProceedingTerminated>N</isPreviousProceedingTerminated>
      <isFinancialSupportDuringPeriod>N</isFinancialSupportDuringPeriod>
      <isExemptionFromAct>N</isExemptionFromAct>
      <principalUnderwriters>
        <principalUnderwriter>
          <principalUnderwriterName>MML Distributers, LLC</principalUnderwriterName>
          <principalUnderwriterFileNumber>8-48203</principalUnderwriterFileNumber>
          <principalUnderwriterCrdNumber>000038030</principalUnderwriterCrdNumber>
          <principalUnderwriterLei>N/A</principalUnderwriterLei>
          <principalUnderWriterStateCountry principalUnderWriterState="US-CT" principalUnderWriterCountry="US"/>
          <isPrincipalUnderwriterAffiliatedWithRegistrant>N</isPrincipalUnderwriterAffiliatedWithRegistrant>
        </principalUnderwriter>
      </principalUnderwriters>
      <isUnderwriterHiredOrTerminated>N</isUnderwriterHiredOrTerminated>
      <publicAccountants>
        <publicAccountant>
          <publicAccountantName>KPMG, LLP</publicAccountantName>
          <pcaobNumber>185</pcaobNumber>
          <publicAccountantLei>N/A</publicAccountantLei>
          <publicAccountantStateCountry publicAccountantState="US-NY" publicAccountantCountry="US"/>
        </publicAccountant>
      </publicAccountants>
      <isPublicAccountantChanged>N</isPublicAccountantChanged>
      <isOpinionOffered>N</isOpinionOffered>
      <isMaterialChange>N</isMaterialChange>
      <isAccountingPrincipleChange>N</isAccountingPrincipleChange>
    </registrantInfo>
    <unitInvestmentTrust>
      <depositors>
        <depositor>
          <depositorName>Talcott Resolution Life Insurance company</depositorName>
          <depositorCrdNo>N/A</depositorCrdNo>
          <depositorLei>8CE7JPU9IU72L3PPD756</depositorLei>
          <depositorStateCountry depositorState="US-CT" depositorCountry="US"/>
          <depositorUltimateParentname>Henry Cornell, David I. Schamis and Robert E. Diamond</depositorUltimateParentname>
        </depositor>
      </depositors>
      <uitAdmins>
        <uitAdmin>
          <uitAdminName>Massachusetts Mutual Life Insurance Company</uitAdminName>
          <uitAdminLei>N/A</uitAdminLei>
          <uitAdminStateCountry uitAdminState="US-MA" uitAdminCountry="US"/>
          <isUitAdminAffiliated>N</isUitAdminAffiliated>
          <isUitAdminSubAdmin>N</isUitAdminSubAdmin>
        </uitAdmin>
      </uitAdmins>
      <isUitAdminHiredTerminated>N</isUitAdminHiredTerminated>
      <registrantSeparateInsuranceAccount isRegistrantSeparateInsuranceAccount="Y" separateAccountSeriesId="S000002596"/>
      <numOfContracts>1436</numOfContracts>
      <contractSecurities>
        <contractSecurity separateAccountSecurityName="Group Variable Funding Agreement Contract" separateAccountContractId="C000007117" numContractsSold="0" numContractsAffected="0" numContractsAffectedRedeemed="0" separateAccountTotalAsset="1142498.35" grossPremiumReceived="472915.00" grossPremiumReceivedSection1035="0" contractValueRedeemed="5071383.00" contractValueRedeemedSection1035="0"/>
        <contractSecurity separateAccountSecurityName="Group Variable Funding Agreement Contract" separateAccountContractId="C000007116" numContractsSold="0" numContractsAffected="0" numContractsAffectedRedeemed="0" separateAccountTotalAsset="249644.00" grossPremiumReceived="0" grossPremiumReceivedSection1035="0" contractValueRedeemed="0" contractValueRedeemedSection1035="0"/>
      </contractSecurities>
      <isRule6C7Reliance>N</isRule6C7Reliance>
      <isRule11A2Reliance>N</isRule11A2Reliance>
    </unitInvestmentTrust>
    <attachmentsTab>
      <isLegalProceedings>false</isLegalProceedings>
      <isProvisionFinancialSupport>false</isProvisionFinancialSupport>
      <isIPAReportInternalControl>false</isIPAReportInternalControl>
      <isChangeAccPrinciples>false</isChangeAccPrinciples>
      <isInfoRequiredEO>false</isInfoRequiredEO>
      <isOtherInfoRequired>false</isOtherInfoRequired>
    </attachmentsTab>
    <signature registrantSignedName="TALCOTT RESOLUTION LIFE INSURANCE CO- SEPARATE ACCOUNT TWELVE" signature="Kenneth Langevin" title="Controller, Massachusetts Mutual Life Insurance Company, Administrator" signedDate="2019-03-18"/>
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