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Nancy Cartwright

Nancy Cartwright, who's better known as the voice of animated prankster Bart Simpson, takes her faith in Scientology very seriously. She's reportedly been a member of the church since 1989, and has donated millions. In 2009, Cartwright even used the voice of her signature character for an automated call that pitched a Scientology event, promising that it would "be a blast, man!" Somehow, we doubt it was as much fun as an episode of "The Simpsons."

Celebrity Scientologists

From Tom Cruise to John Travolta, check out the many stars who are members of the Church of Scientology.