George Clooney Spending the Night With Betty White

Two of Hollywood's biggest names sign up for live telethon benefiting autism education

Talk about a hot couple!

We just got word that George Clooney and Betty White have just signed on to participate in Comedy Central's Night of Too Many Stars: An Overbooked Concert for Autism Education.

Hosted by Jon Stewart the star-studded live telethon on Thursday will include a celeb phone bank along with pretaped segments by Conan O'Brien and Adam Sandler, among others.

Tom Hanks, Jimmy Kimmel, Jesse Tyler Ferguson, Eric Stonestreet, Jim Parsons, and Lauren Graham are also on the night's lineup.

Launched four years ago, Night of Too Many Stars has raised more than $7 million for various autism education and family services programs.