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

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2013-10-01</periodOfReport>

    <noSecuritiesOwned>1</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001578845</issuerCik>
        <issuerName>Actavis plc</issuerName>
        <issuerTradingSymbol>ACT</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001133713</rptOwnerCik>
            <rptOwnerName>BLOEM JAMES H</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>MORRIS CORPORATE CENTER III</rptOwnerStreet1>
            <rptOwnerStreet2>400 INTERPACE PARKWAY</rptOwnerStreet2>
            <rptOwnerCity>PARSIPPANY</rptOwnerCity>
            <rptOwnerState>NJ</rptOwnerState>
            <rptOwnerZipCode>07054</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable></nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes></footnotes>

    <remarks>On October 1, 2013, Actavis, Inc. (&quot;Actavis&quot;), Warner Chilcott Public Limited Company (&quot;Warner Chilcott&quot;) and a newly formed holding company incorporated in Ireland named Actavis plc (&quot;New Actavis&quot;) consummated a transaction (the &quot;Acquisition&quot;) pursuant to which Actavis and Warner Chilcott each became wholly owned subsidiaries of New Actavis. The Acquisition was effected by means of an approved &quot;scheme arrangement&quot; under Irish law.  This report reflects the beneficial ownership of the reporting person at the time of the consummation of the Acquisition and does not include the securities of New Actavis acquired by the reporting person upon the consummation of the Acquisition. The reporting person will file a Form 4 reflecting his acquisition of New Actavis securities in connection with the consummation of the Acquisition.Exhibit List:  Exhibit 24 - Power of Attorney</remarks>

    <ownerSignature>
        <signatureName>/s/ David A. Buchen, Attorney-in-Fact for James H. Bloem</signatureName>
        <signatureDate>2013-10-03</signatureDate>
    </ownerSignature>
</ownershipDocument>
