George Clooney and Leonardo DiCaprio are opening up their wallets to help victims in the earthquake-ravaged Haiti.

Clooney is donating $1 million to Friday's "Hope for Haiti Now" celebrity telethon. He will officially make his donation during the telecast.

He told Entertainment Tonight that he's been up "three days straight" trying to put together the broadcast, which will air on all four leading U.S. networks, dozens of cable channels and internationally on Internet websites. Brad Pitt and Robert Pattinson are among the participants; Beyonce and Madonna have been added as performers.

Meanwhile, DiCaprio also has donated $1 million.

His money will go to the Clinton Bush Haiti Fund (CBHF) to support near-term assistance and long-term recovery efforts, his rep tells

His donation, dispersed through the Leonardo DiCaprio Fund, which fosters awareness of environmental issues, will help with immediate relief efforts as well as with longer-term redevelopment and infrastructure projects, including a focus towards sustainable development.

"I am grateful for the generous gift Leonardo DiCaprio and his Foundation have made in support of our Clinton Bush Haiti Fund," former President Clinton said. "Combined with the outpouring of donations from Americans and citizens around the world of all means, this support will go a long way to help save more lives, reach more people with emergency assistance, and help the Haitian people build their nation back stronger and more secure than it was before the earthquake."