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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
 QZhLwgxqCzqDm3tm+Y3BFeL9VW7xW5p9EftchWO1u3xn7ET9Y9NnbM1XjGrFh1cu
 FlD37YvoEULOer7NcsHU4g==

<SEC-DOCUMENT>0001179110-05-013998.txt : 20050708
<SEC-HEADER>0001179110-05-013998.hdr.sgml : 20050708
<ACCEPTANCE-DATETIME>20050708112003
ACCESSION NUMBER:		0001179110-05-013998
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20050706
FILED AS OF DATE:		20050708
DATE AS OF CHANGE:		20050708

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ADVANCED CELL TECHNOLOGY, INC.
		CENTRAL INDEX KEY:			0001140098
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				870656515
		STATE OF INCORPORATION:			NV
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		381 PLANTATION STREET
		CITY:			WORCESTER
		STATE:			MA
		ZIP:			01605
		BUSINESS PHONE:		508-756-1212

	MAIL ADDRESS:	
		STREET 1:		381 PLANTATION STREET
		CITY:			WORCESTER
		STATE:			MA
		ZIP:			01605

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	A.C.T. Holdings, Inc.
		DATE OF NAME CHANGE:	20050303

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	A.C.T Holdings, Inc.
		DATE OF NAME CHANGE:	20050207

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ACT Holdings Inc.
		DATE OF NAME CHANGE:	20050204

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			WEST MICHAEL D
		CENTRAL INDEX KEY:			0001202529

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-50295
		FILM NUMBER:		05944952

	MAIL ADDRESS:	
		STREET 1:		ONE INNOVATION DR
		CITY:			WORCESTER
		STATE:			MA
		ZIP:			01605
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 4 -
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2005-07-06</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001140098</issuerCik>
        <issuerName>ADVANCED CELL TECHNOLOGY, INC.</issuerName>
        <issuerTradingSymbol>OTCBB:ACTC</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001202529</rptOwnerCik>
            <rptOwnerName>WEST MICHAEL D</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>381 PLANTATION STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>WORCESTER</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>01605</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable></nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Employee Stock Option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>0.85</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2005-07-06</value>
                <footnoteId id="F1"/>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>3180223</value>
                    <footnoteId id="F2"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.85</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2005-07-06</value>
            </exerciseDate>
            <expirationDate>
                <value>2015-01-31</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>3180223</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>3180223</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">The option grant was approved by the Board of Directors on January 31, 2005, subject to shareholder approval of the stock option plan under which the option was granted.  Advanced Cell Technology, Inc.'s shareholders approved the plan on July 6, 2005.</footnote>
        <footnote id="F2">The stock options vest as follows: 1,590,111 options vested immediately upon grant with the remainder vesting in equal monthly installments over 48 months.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Michael D. West</signatureName>
        <signatureDate>2005-07-07</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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