-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 MEA7mOM40L6j9YTNrAIEwC5DSU8U7AsLSfW5e3D9xPMHV3SbQ5H0un5DHRIdXvnj
 1GHOUyEf9/bGQ7LM6+lalA==

<SEC-DOCUMENT>0001179110-07-009105.txt : 20070503
<SEC-HEADER>0001179110-07-009105.hdr.sgml : 20070503
<ACCEPTANCE-DATETIME>20070503201528
ACCESSION NUMBER:		0001179110-07-009105
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20070501
FILED AS OF DATE:		20070503
DATE AS OF CHANGE:		20070503

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			SHAPIRO ALAN C
		CENTRAL INDEX KEY:			0001194959

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-50295
		FILM NUMBER:		07817483

	MAIL ADDRESS:	
		STREET 1:		8201 PRESTON ROAD
		STREET 2:		STE 600
		CITY:			DALLAS
		STATE:			TX
		ZIP:			75225

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:			DE
		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
</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>2007-05-01</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001194959</rptOwnerCik>
            <rptOwnerName>SHAPIRO ALAN C</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>17567 CAMINO DE YATASTO</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>PACIFIC PALISADES</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>90272</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2007-05-01</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>13716</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>.61</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>231676</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Shapiro Family Trust</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Convertible Debenture (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>.90</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2007-05-01</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>13716</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <value>2008-09-15</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>13716</value>
                    <footnoteId id="F1"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>139444</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Shapiro Family Trust</value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">The Convertible Debenture is redeemable by the Issuer using shares of the Issuer's Common Stock at a price per share equal to the lesser of (i) $.90, and (ii) 85% of the average closing prices on the ten days immediately prior to the date of redemption.  In accordance with the terms of the Convertible Debenture, the Convertible Debenture may be converted by the reporting person at any time while outstanding, and the Issuer is required to redeem (in cash or in shares) 1/30th of the outstanding amount of the Convertible Debenture each month during its term.  On May 1st, the Issuer effected the May redemption using shares of Common Stock having a value of $.61 per share, resulting in the issuance to the reporting person of 13,716 shares of Common Stock.</footnote>
        <footnote id="F2">This amount does not include 87,063 shares of Common Stock owned directly by the reporting person.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Alan C. Shapiro</signatureName>
        <signatureDate>2007-05-02</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----