Walt Disney himself was the first voice of Mickey Mouse.
Reno 911’s Carlos Alazraqui was the voice of Rocko
Jonathan Frakes was David Xanatos on Gargoyles.
Marina Sirtis was the voice of Demona on Gargoyles
Micheal Dorn was the voice of Coldstone on Gargoyles.
Jessica Walter was the voice of Fran on Dinosaurs.
George Clooney was the voice of the doctor in South Park: Bigger, Longer, and Uncut
Clooney was also the voice of Stan’s Gay Dog
Dustin Hoffman was Benedict Arnold on Liberty’s Kids.
LeVar Burton was Kwame on Captain Planet and the Planeteers.
Bruce Willis was Spike in The Rugrats Movie.
Brent Spiner was the voice of Conan O’Brien in South Park: Bigger, Longer, and Uncut.
Adam West was the voice of R. Kelley’s Lawyer on The Boondocks.
Dante Basco, best known as Rufio on Hook, was the voice of Zuko on Avatar: The Last Airbender.
Dante was also the voice of American Dragon: Jake Long.
Alec Baldwin was the voice of Bad Guy Dennis in The Spongebob Squarepants Movie.
Micheal Cera was the voice of Brother Bear on The Bernstein Bears
Joey Lawrence was the voice of Oliver in Oliver & Company.
Danny DeVito was the voice of Phil in Hercules.
Eric Idle was the voice of Wreck-Gar in Transformers: The Movie.
James Avery, best known as Uncle Phil on The Fresh Prince of Bell Air was the voice of Shredder.
Stephen Colbert and Steve Carrell provided the voices of The Ambiguously Gay Duo
Micheal J Fox voiced Stuart Little.
John Leguizamo was Rat #2 in Doctor Dolittle.
Kelsey Grammar gave his voice to Sideshow Bob on The Simpsons.
Whoopie Goldberg was Fantasy the Book in The Pagemaster.
Vin Diesel was The Iron Giant.
Mark Hamil was originally cast as Invader Zim, but was fired…
…because he was already too well known as the voice of The Joker on Batman: The Animated Series.
Tim Curry was the voice of Nigel Thornberry on The Wild Thornberrys.
Burt Reynolds was Charlie on All Dogs Go to Heaven.
Patrick Stewart is the voice of The Great Prince in Bambi II.
Martin Sheen was Sly Sludge on Captain Planet.
Brendan Frasier was the voice of the Tasmanian Devil in Looney Toons: Back in Action
Mel Gibson was John Smith in Pocahontas.
Daveigh Chase, who played Samara in The Ring, was the voice of Lilo in Lilo and Stich.
Val Kilmer was Moses (and God) in The Prince of Egypt.
Mr. Krabs and Lex Luthor were both voiced by Clancy Brown.
Starscream, Spongebob Squarepants, Dog from Catdog, and Spyro the Dragon are all voiced by Tom Kenny.
Phil LaMarr gave his voice to Static Shock, Samurai Jack, Hermes Conrad, and Green Lantern.
Eeyore and Optimus Prime are voiced by the same man: Peter Cullen.