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Laura Prepon

Former “That ‘70s Show” star Laura Prepon got into Scientology thanks to her one-time boyfriend, “Malcolm in the Middle” actor Christopher Masterson. Although the twosome split in 2009, she’s still involved in the religion, but has maintained a low profile about it. The 32-year-old doesn’t talk about it much, but in 2007, she told Women’s Health, “Anyone who knows me is just like, ‘Wow, if Laura is a Scientologist, then there has to be something to this.’ When I hear something negative, I don't get defensive. I know what's true for me and what works for me.”

Celebrity Scientologists

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