-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
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 pPmp1fT0VQqK7AFlO1aMLA==

<SEC-DOCUMENT>0001179110-05-013993.txt : 20050708
<SEC-HEADER>0001179110-05-013993.hdr.sgml : 20050708
<ACCEPTANCE-DATETIME>20050708105642
ACCESSION NUMBER:		0001179110-05-013993
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:			Peabody Robert
		CENTRAL INDEX KEY:			0001317296

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-50295
		FILM NUMBER:		05944890

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		5087561212

	MAIL ADDRESS:	
		STREET 1:		ONE INNOVATION DRIVE
		CITY:			WORCHESTER
		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>0001317296</rptOwnerCik>
            <rptOwnerName>Peabody Robert</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>381 PLANTATION ST.</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>WORCESTER</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>01605</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>VP - Grant Administration</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>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>400000</value>
                    <footnoteId id="F2"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.85</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2005-07-06</value>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <value>2015-01-31</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>400000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>400000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">(1) The option grant was approved by the Board of Directors of Advanced Cell Technology, Inc. on January 31, 2005, subject to shareholder approval of the stock option plan under which the option was granted.  Shareholders approved the option plan on July 6, 2005.</footnote>
        <footnote id="F2">The stock options vest in equal monthly installments over a 48-month period.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Robert Peabody</signatureName>
        <signatureDate>2005-07-07</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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