Exhibit 99.1

DPL Reschedules 2011 Annual Meeting

DAYTON, Ohio — July 20, 2011 — DPL Inc. (NYSE:DPL) announced today it has rescheduled its annual meeting of shareholders to September 23, 2011 at 10 a.m. Eastern time.  The meeting will be held at the Mandalay Banquet Center at 2700 East River Road, Dayton, Ohio 45439.

Holders of DPL common shares of record at the close of business on August 2, 2011 are entitled to vote at the annual meeting.  Shareholders will be voting on the proposed merger of DPL with AES Corporation that was announced on April 20.  A definitive proxy statement will be mailed in August to shareholders entitled to vote at the annual meeting and it will provide information about the merger, and the other proposals to be considered at the meeting.

Completion of the transaction between DPL and AES is subject to customary closing conditions, including the approval by DPL shareholders and the receipt of additional regulatory approvals.  The parties currently expect to complete the merger in the fourth quarter of 2011 or first quarter of 2012.

Under DPL Inc.’s Regulations, shareholders who wish to nominate persons for election as directors at the annual meeting must provide advance notice to DPL Inc. not less than 50 days before the meeting date, by August 3, 2011.

About DPL

DPL Inc. (NYSE:DPL) is a regional energy company.  DPL was named one of Forbes’ “100 Most Trustworthy Companies” for the second consecutive year in August 2010.

DPL’s principal subsidiaries include The Dayton Power and Light Company (DP&L); DPL Energy, LLC (DPLE); and DPL Energy Resources, Inc. (DPLER), which also does business as DP&L Energy.  The Dayton Power and Light Company, a regulated electric utility, provides service to over 500,000 retail customers in West Central Ohio; DPLE engages in the operation of merchant peaking generation facilities; and DPLER is a competitive retail electric supplier in Ohio.  DPL, through its subsidiaries, owns and operates approximately 3,800 megawatts of generation capacity, of which 2,800 megawatts are low cost coal-fired units and 1,000 megawatts are natural gas and diesel peaking units.  Further information can be found at www.dplinc.com.

Certain statements contained in this press release are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995.  Matters discussed in this press release that relate to events or developments that are expected to occur in the future, including management’s expectations, strategic objectives, business prospects, anticipated economic performance and financial condition and other similar matters, such

as those relating to earnings guidance and capital expenditure projections, constitute forward-looking statements.  Forward-looking statements are based on management’s beliefs, assumptions and expectations of future economic performance, taking into account the information currently available to management.  These statements are not statements of historical fact and are typically identified by terms and phrases such as “anticipate,” “believe,” “intend,” “estimate,” “expect,” “continue,” “should,” “could,” “may,” “plan,” “project,” “predict,” “will,” and similar expressions.  Such forward-looking statements are subject to risks and uncertainties, and investors are cautioned that outcomes and results may vary materially from those projected due to various factors beyond our control, including but not limited to: abnormal or severe weather and catastrophic weather-related damage; unusual maintenance or repair requirements; changes in fuel costs and purchased power, coal, environmental emissions, natural gas, oil, and other commodity prices; volatility and changes in markets for electricity and other energy-related commodities; performance of our suppliers and other counterparties; increased competition and deregulation in the electric utility industry; increased competition in the retail generation market; changes in interest rates; state, federal and foreign legislative and regulatory initiatives that affect cost and investment recovery, emission levels and regulations, rate structures or tax laws; federal and state approval of merger transaction; changes in federal and/or state environmental laws and regulations to which DPL and its subsidiaries are subject; the development and operation of Regional Transmission Organizations (RTOs), including PJM Interconnection, L.L.C. (PJM) to which DPL’s operating subsidiary (DP&L) has given control of its transmission functions; changes in our purchasing processes, pricing, delays, employee, contractor, and supplier performance and availability; significant delays associated with large construction projects; growth in our service territory and changes in demand and demographic patterns; changes in accounting rules and the effect of accounting pronouncements issued periodically by accounting standard-setting bodies; financial market conditions, including impacts the current financial crisis may have on our business and financial condition; the outcomes of litigation and regulatory investigations, proceedings or inquiries; general economic conditions; and the risks and other factors discussed in DPL’s and DP&L’s filings with the Securities and Exchange Commission.

Forward-looking statements speak only as of the date of the document in which they are made.  We disclaim any obligation or undertaking to provide any updates or revisions to any forward-looking statement to reflect any change in our expectations or any change in events, conditions or circumstances on which the forward-looking statement is based.

The information contained herein is submitted for general information and not in connection with any sale or offer for sale of, or solicitation of any offer to buy, any securities.

Additional Information

This communication is being made in respect of the proposed merger transaction involving DPL and AES.  In connection with the proposed transaction, on June 22, 2011, DPL filed with the Securities and Exchange Commission a preliminary proxy statement regarding the proposed merger transaction and prior to its annual meeting of shareholders will mail a definitive proxy statement to its shareholders.  Shareholders are encouraged to read the proxy statement regarding the proposed transaction in its entirety because it contains important information about the transaction.  Shareholders may obtain a free copy of the preliminary proxy statement, as well as any supplements or amendments thereto and other filings made by DPL regarding DPL, AES and the proposed transaction, without charge, at the Securities and Exchange Commission’s Internet site (http://www.sec.gov).  These materials can also be obtained, when available, without charge, by directing a request to DPL at communications@dplinc.com.

DPL, AES and their respective executive officers, directors and other persons may be deemed to be participants in the solicitation of proxies from DPL’s shareholders with respect to the proposed transaction.  Information regarding the officers and directors of DPL is included in its Annual Report on Form 10-K for the year ended December 31, 2010, which previously was filed with the Securities and Exchange Commission on February 18, 2011, and DPL’s preliminary proxy statement filed with the Securities and Exchange Commission on June 22, 2011.  Other information regarding the participants in the solicitation and a description of their direct and indirect interests, by security holdings or otherwise, is contained in the proxy statement filed by DPL with the Securities and Exchange Commission on June 22, 2011 and will be contained in the definitive proxy statement and other relevant materials to be filed with the Securities and Exchange Commission in connection with the proposed transaction.

This communication shall not constitute an offer to sell or the solicitation of an offer to buy any securities, nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction.  No offering of securities shall be made except by means of a prospectus meeting the requirements of Section 10 of the Securities Act of 1933, as amended.

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