George Clooney

George Clooney performed the voice of Stan Marsh's dog, Sparky, in the South Park Episode, Big Gay Al's Big Gay Boat Ride.

Clooney's "Smug Cloud", a smog-like cloud emitted from his Academy Award acceptance speech, wreaked havoc on South Park in the episode, Smug Alert!.

Clooney also performed the voice of Dr. Gouache in ''South Park: Bigger, Longer & Uncut.