<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2014-06-08</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000929351</issuerCik>
        <issuerName>LIONS GATE ENTERTAINMENT CORP /CN/</issuerName>
        <issuerTradingSymbol>LGF</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001254639</rptOwnerCik>
            <rptOwnerName>BURNS MICHAEL RAYMOND</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>2700 COLORADO AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2>STE 200</rptOwnerStreet2>
            <rptOwnerCity>SANTA MONICA</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>90404</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Vice Chairman</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Shares</value>
            </securityTitle>
            <transactionDate>
                <value>2014-06-08</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1419</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>26.66</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1614014</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Represents common shares withheld by the Issuer to satisfy certain tax withholding obligations upon the vesting of 2,719 restricted share units. The grant of the restricted share units was previously reported and, pursuant to the Lions Gate Entertainment Corp. 2012 Incentive Plan and the Issuer's policies, 1,419 common shares were automatically canceled to cover certain of the reporting person's tax withholding obligations. No common shares were sold by the Issuer or the reporting person.</footnote>
        <footnote id="F2">Amount includes the following restricted share units granted by the Issuer payable upon vesting in an equal number of common shares of the Issuer: (i) 97,500 restricted share units that are scheduled to vest in three equal annual installments beginning October 30, 2014; and (ii) 14,343 restricted share units that are scheduled to vest in two equal annual installments beginning April 5, 2015.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Michael Burns (By Adrian Kuzycz by Power of Attorney)</signatureName>
        <signatureDate>2014-06-10</signatureDate>
    </ownerSignature>
</ownershipDocument>
