Exhibit 99.1

DPL Inc. Announces Quarterly Dividend and DP&L Declares Quarterly Preferred Dividends

DAYTON, Ohio, April 27, 2011 — The board of directors of DPL Inc. (NYSE: DPL) declared a quarterly dividend of $0.3325 per share payable June 1, 2011 to common shareholders of record on May 16, 2011. This action reflects the dividend increase announced December 8, 2010 resulting in an annualized rate of $1.33 per share.

In addition, the board of directors of The Dayton Power and Light Company (DP&L) declared quarterly dividends on DP&L preferred stocks as follows:

$0.9375 per share on the 3.75% Series A, Cumulative

$0.9375 per share on the 3.75% Series B, Cumulative

$0.9750 per share on the 3.90% Series C, Cumulative

The preferred dividends are payable June 1, 2011 to holders of record on May 16, 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 2010.

DPL’s principal subsidiaries include The Dayton Power and Light Company (DP&L); DPL Energy, LLC (DPLE); and DPL Energy Resources, Inc. (DPLER).  DP&L, 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, selling to major industrial and commercial customers. 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.

Forward Looking Statements

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 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; a material deterioration in DPL’s retail and/or wholesale businesses and assets; 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; 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; the outcomes of litigation and regulatory investigations, proceedings or inquiries; general economic conditions; an otherwise material adverse change in the business, assets, financial condition or results of operations of DPL; and the risks and other factors discussed in DPL’s and DP&L’s filings with the Securities and Exchange Commission.  DPL recently announced that it had entered into a merger agreement with The AES Corporation (AES).  There can be no assurance as to the timing of the closing of the proposed merger transaction, or whether the transaction will close at all.  The following factors, among others, could also cause or contribute to causing our actual results to differ materially from the results anticipated in our forward-looking statements:  the ability to obtain the approval of the transaction by DPL’s shareholders; the ability to obtain required regulatory approvals of the transaction or to satisfy other conditions to the transaction on the terms and expected timeframe or at all; transaction costs; and the effects of disruption from the transaction making it more difficult to maintain relationships with employees, customers, other business partners or government entities.

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.

Additional Information

Information concerning the proposed merger transaction involving DPL and AES, including a copy of the merger agreement, is included in DPL’s Current Report on Form 8-K filed with the Securities and Exchange Commission on April 20, 2011.  In connection with the proposed transaction, DPL will file with the Securities and Exchange Commission a proxy statement and will mail the proxy statement to its shareholders.  Shareholders are encouraged to read the proxy statement regarding the proposed transaction in its entirety when it becomes available because it will contain additional important information about the transaction.  Shareholders will be able to obtain a free copy of the proxy statement, as well as 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 and DPL’s notice and proxy statement for its recently postponed annual meeting of shareholders, which were filed with the Securities and Exchange Commission on February 18, 2011 and March 18, 2011, respectively.  Other information regarding the participants in the solicitation and a description of their direct and indirect interests, by security holdings or otherwise, will be contained in the proxy statement and other relevant materials to be filed with the Securities and Exchange Commission in connection with the proposed transaction and the rescheduled annual meeting of shareholders, which will be held at a date to be determined by DPL’s board of directors.

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.