-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 RZGRcjeIkY9ccB6lcmLZDWxzSYEASWrJhuOuhD9pFTGZWe11ERZE14Z0DmbNogPO
 3plui3r4Hg6bVqrb0p2XSA==

<SEC-DOCUMENT>0001209191-08-039477.txt : 20080630
<SEC-HEADER>0001209191-08-039477.hdr.sgml : 20080630
<ACCEPTANCE-DATETIME>20080630191129
ACCESSION NUMBER:		0001209191-08-039477
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20080619
FILED AS OF DATE:		20080630
DATE AS OF CHANGE:		20080630

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Kayne Anderson MLP Investment CO
		CENTRAL INDEX KEY:			0001293613
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			MD
		FISCAL YEAR END:			1130

	BUSINESS ADDRESS:	
		STREET 1:		1800 AVENUE OF THE STARS, SECOND FLOOR
		CITY:			LOS ANGELES
		STATE:			CA
		ZIP:			90067
		BUSINESS PHONE:		877-657-3863

	MAIL ADDRESS:	
		STREET 1:		1800 AVENUE OF THE STARS, SECOND FLOOR
		CITY:			LOS ANGELES
		STATE:			CA
		ZIP:			90067

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Kayne Anderson Midstream Investment CO
		DATE OF NAME CHANGE:	20040614

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			METROPOLITAN LIFE INSURANCE CO/NY
		CENTRAL INDEX KEY:			0000728618
		STANDARD INDUSTRIAL CLASSIFICATION:	INSURANCE AGENTS BROKERS & SERVICES [6411]
		STATE OF INCORPORATION:			NY
		FISCAL YEAR END:			0930

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-21593
		FILM NUMBER:		08927305

	BUSINESS ADDRESS:	
		STREET 1:		ONE MADISON AVE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10010
		BUSINESS PHONE:		2125785914

	MAIL ADDRESS:	
		STREET 1:		ONE MADISON AVENUE LAW DEPARTMENT
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10010-3690
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>bny62097_mlic3.xml
<DESCRIPTION>MAIN DOCUMENT DESCRIPTION
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0203</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2008-06-19</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001293613</issuerCik>
        <issuerName>Kayne Anderson MLP Investment CO</issuerName>
        <issuerTradingSymbol>KYN</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000728618</rptOwnerCik>
            <rptOwnerName>METROPOLITAN LIFE INSURANCE CO/NY</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>10 PARK AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>MORRISTOWN</rptOwnerCity>
            <rptOwnerState>NJ</rptOwnerState>
            <rptOwnerZipCode>07962</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Assistant Secretary</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Floating Rate Series L Senior Note due 2013</value>
            </securityTitle>
            <postTransactionAmounts>
                <valueOwnedFollowingTransaction>
                    <value>75000000.00</value>
                </valueOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <remarks>Filed pursuant to Section 30(h) of the Investment Company Act of 1940. The reporting party is filing as a 10% debt holder of the referenced
securities.</remarks>

    <ownerSignature>
        <signatureName>Thomas C. Hoi</signatureName>
        <signatureDate>2008-06-27</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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