<SUBMISSION>
<ACCESSION-NUMBER>0001179110-05-011638
<TYPE>3
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20050528
<FILING-DATE>20050603
<DATE-OF-FILING-DATE-CHANGE>20050603
<ISSUER>
<COMPANY-DATA>
<CONFORMED-NAME>Warner Music Group Corp.
<CIK>0001319161
<ASSIGNED-SIC>7900
<IRS-NUMBER>134271875
<STATE-OF-INCORPORATION>DE
<FISCAL-YEAR-END>0930
</COMPANY-DATA>
<BUSINESS-ADDRESS>
<STREET1>75 ROCKEFELLER PLAZA
<CITY>NEW YORK
<STATE>NY
<ZIP>10019
<PHONE>212-275-2000
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>75 ROCKEFELLER PLAZA
<CITY>NEW YORK
<STATE>NY
<ZIP>10019
</MAIL-ADDRESS>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>WMG Parent Corp.
<DATE-CHANGED>20050228
</FORMER-COMPANY>
</ISSUER>
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>Blackstone Richard
<CIK>0001329094
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>3
<ACT>34
<FILE-NUMBER>001-32502
<FILM-NUMBER>05876873
</FILING-VALUES>
<BUSINESS-ADDRESS>
<PHONE>2122752000
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>C/O WARNER MUSIC GROUP CORP.
<STREET2>75 ROCKEFELLER PLAZA
<CITY>NEW YORK
<STATE>NY
<ZIP>10019
</MAIL-ADDRESS>
</REPORTING-OWNER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 3 -
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2005-05-28</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001319161</issuerCik>
        <issuerName>Warner Music Group Corp.</issuerName>
        <issuerTradingSymbol>WMG</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001329094</rptOwnerCik>
            <rptOwnerName>Blackstone Richard</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>75 ROCKEFELLER PLAZA</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10019</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>CEO-Warner/Chappell Music, Inc</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock, par value $0.001 per share</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>238988.7162</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes></footnotes>

    <remarks>Reporting Person became an executive of Warner Music Group Corp. on May 28, 2005.</remarks>

    <ownerSignature>
        <signatureName>/s/ Richard Blackstone</signatureName>
        <signatureDate>2005-05-31</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SUBMISSION>
