Bill Clinton speaks at the Democratic National Convention. (Jason Reed -- Reuters)

Both President Obama and Mitt Romney will address the Clinton Global Initiative's annual meeting in New York, from Sept. 23 to 25.

The nonpartisan organization, founded by former president Bill Clinton in 2005, brings together leaders from around the globe to work on the world's economic, environmental, health and educational problems. 

"I’m grateful that President Obama and Governor Romney are taking time to join leaders from all parts of society who choose to address our greatest global challenges through the Clinton Global Initiative,” Clinton said in a statement. 

Both Obama and Sen. John McCain (R-Ariz.) spoke at the 2008 CGI. At the time, McCain had just suspended his campaign to deal with the financial collapse, a crisis that overshadowed talk of the wider world.