Ameren (AEE) S-8 Registration of securities for employees

Exhibit 24

POWER OF ATTORNEY

WHEREAS, AMEREN CORPORATION, a Missouri corporation (herein referred to as the “Company”), intends to file with the Securities and Exchange Commission, under the Securities Act of 1933, as amended, a registration statement or registrant statements on an appropriate form and any amendments thereto, covering the registration of common stock under the Ameren Corporation Savings Investment Plan, as authorized by the Company’s Board of Directors on December 10, 2010; and

WHEREAS, each of the below undersigned is a director of the Company;

NOW, THEREFORE, each of the undersigned hereby constitutes and appoints Thomas R. Voss and/or Martin J. Lyons, Jr. and/or Gregory L. Nelson the true and lawfulattorneys-in-fact of the undersigned, for and in the name, place and stead of the undersigned, to affix the name of the undersigned to said registration statement(s) and any amendments thereto, and, for the performance of the same acts, each with power to appoint in their place and stead and as their substitute, one or moreattorneys-in-fact for the undersigned, with full power of revocation, and hereby ratify and confirm all that saidattorneys-in-fact may do by virtue hereof.

IN WITNESS WHEREOF, the undersigned have hereunto set their hands this 9^th day of August, 2013:

Catherine S. Brune, Director	/s/ Catherine S. Brune
Ellen M. Fitzsimmons, Director	/s/ Ellen M. Fitzsimmons
Walter J. Galvin, Director	/s/ Walter J. Galvin
Richard J. Harshman, Director	/s/ Richard J. Harshman
Gayle P. W. Jackson, Director	/s/ Gayle P. W. Jackson
James C. Johnson, Director	/s/ James. C. Johnson
Steven H. Lipstein, Director	/s/ Steven H. Lipstein
Patrick T. Stokes, Director	/s/ Patrick T. Stokes
Stephen R. Wilson, Director	/s/ Stephen R. Wilson
Jack D. Woodard, Director	/s/ Jack D. Woodard

STATE OF MISSOURI	)
	)	SS.
CITY OF ST. LOUIS	)

On this 9^th day of August, 2013, before me, the undersigned Notary Public in and for said State, personally appeared theabove-named directors of Ameren Corporation, known to me to be the persons described in and who executed the foregoing power of attorney and acknowledged to me that they executed the same as their free act and deed for the purposes therein stated.

IN TESTIMONY WHEREOF, I have hereunto set my hand and affixed my official seal.

/s/ Sue E. Whitman

Sue E. Whitman – Notary Public

Notary Seal, State of

Missouri - St. Louis County

Commission #13777931

My Commission Expires 4/28/2017