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TOM CRUISEThe "Mission Impossible" star has been an outspoken advocate of the Church for years, even debating Matt Lauer on Scientology's opposition to psychiatric care.

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JOHN TRAVOLTA/KELLY PRESTONThe "Pulp Fiction" star and his wife are both practitioners of Scientology, with Travolta having flown Church volunteers to Haiti in 2010 to provide disaster relief.

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BECKThe musician is a lifelong practitioner of Scientology, stating in a 2005 interview that his father has been a member of the Church for over 30 years.

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JASON LEEThe "My Name is Earl" star's wife cited his devotion to Scientology as a cause of their divorce in 2001.

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ELISABETH MOSSThe "Mad Men" actress has defended the Church in interviews, saying people are "misinformed" on many of its stances.

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NANCY CARTWRIGHTThe voice of Bart Simpson caught flack when she used the voice in an advertisement for a Scientology conference in 2009.

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GRETA VAN SUSTERENThe Fox News commentator married into the Church after meeting her husband, John Coale.

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DANNY MASTERSONThe former "That '70s Show" star and Scientologist took issue with the HBO documentary "Going Clear," saying, "I wonder if Sundance would allow a documentary of, like, eight people who hate Judaism?"

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ERIKA CHRISTENSENThe "Parenthood" star grew up in the Church and stated in an interview that they do not in fact "worship rabbits."

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JENNA ELFMANThe actress has actively supported Scientology-related charities, including the Citizens Commission on Human Rights: Psychiatry, Industry of Death."

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KIRSTIE ALLEYThe actress credits the Church with helping her turn her life around. She also called former member Leah Remini a "bigot" for blasting Scientology.

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JULIETTE LEWISThe actress defended fellow Scientologist Tom Cruise after his fiery interview with Matt Lauer regarding Scientology's stance on psychiatry.

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GIOVANNI RIBISIThe "Avatar" actor grew up in the Church, attending a Scientology school as a child.