Atlantic Power Corporation Announces Nomination of Two Additional Members to the Board of Directors

TORONTO, ONTARIO--(Marketwire - June 14, 2010) - Atlantic Power Corporation (TSX:ATP)(TSX:ATP.DB)(TSX:ATP.DB.A) (the "Company") is pleased to announce that two new candidates, Mr. Richard Foster Duncan and Ms. Holli Nichols, will be proposed for election to the board of directors at the upcoming annual and special meeting of the shareholders of the Company to be held at 10:00 a.m. (Toronto time) on June 29, 2010 at the King Edward Hotel, Belgravia Room, 37 King Street East, Toronto, Ontario.

The Nominating and Governance Committee of the Company engaged a search firm to assist it in finding highly qualified candidates, and feels that both Richard Foster Duncan and Holli Nichols have substantial experience and knowledge which will provide significant benefit to the Company. "We are very pleased to nominate two candidates of such high caliber, and believe that this should underscore for shareholders how well-focused Atlantic Power's board of directors and management are on enhancing competitive strengths to execute the Company's growth strategy", said Irving Gerstein, Chairman of the Board.

Mr. Duncan is currently the Managing Director of Advantage Capital Partners, a Director of North American Energy Alliance Holdings, LLC and SensorTran Inc. and is also on the Board of Advisors of GridPoint, Inc. He has more than 30 years of senior corporate, investment banking, and private equity experience, including as Executive Vice President and Chief Financial Officer at the US utility holding companies Cinergy Corporation and LG&E Energy and as an Advisor at Kohlberg Kravis Roberts & Co. Ms. Nichols is currently Executive Vice-President and Chief Financial Officer of Dynegy, Inc., a large independent power company listed on the NYSE, and is a certified public accountant. Ms. Nichols has over 10 years of industry experience at Dynegy, including strategic planning, corporate development, risk management and investor relations. She was previously a Senior Audit Manager with PricewaterhouseCoopers.

The Company has prepared a supplement to its May 25, 2010 Management Information Circular, which contains full biographical information for each candidate, as well as a supplemental form of proxy which will permit shareholders to vote on the election of each new candidate. These documents will be available on SEDAR.com and on the Company's website www.atlanticpower.com.

About Atlantic Power

Atlantic Power Corporation is an independent power producer that owns interests in a diversified portfolio of power generation and transmission projects located in the United States. The Company's objectives are to maintain the stability of dividends to its shareholders and increase the long term value of the Company by enhancing the performance of its existing assets and by making accretive acquisitions.

FOR FURTHER INFORMATION PLEASE CONTACT:
        Atlantic Power Corporation
        Patrick Welch
        Chief Financial Officer
        (617) 977-2700
        info@atlanticpower.com
        www.atlanticpower.com

Source: Atlantic Power Corporation
Contact: Atlantic Power Corporation Patrick Welch Chief Financial Officer (617) 977-2700 info@atlanticpower.com www.atlanticpower.com