Famous Scientologists

John Travolta and Kelly Preston

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"Saturday Night Fever" star John Travolta has been practicing Scientology since 1975, when he read the book "Dianetics" on the set of "The Devil's Rain." His wife, Kelly Preston, is also a practicing member and made headlines when she said that Scientology helped her deal with her son Jett's death. She has opted for silent child births, which the church advocates. "It's just no words as much as possible. If you need to moan, if you cry out or all of that, of course, is normal," Preston said. "But just bringing them in as peaceful and gentle a way as possible."

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Tom Cruise and Katie Holmes

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Tom Cruise is a prominent member of the Church of Scientology and was introduced to the religion through his first wife, Mimi, Rogers in 1990. The actor said that psychiatry should be "outlawed" in 2005, speaking in reference to actress Brooke Shields' treatment for post-partum depression. Scientology is known to be against the medical practice. Katie Holmes' decision in 2012 to divorce Tom Cruise is said to be based largely on her desire to distance her and Cruise's daughter Suri from some parts of Scientology.

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Sci-fi writer L. Ron Hubbard parlayed his 1950s self-help system, Dianetics, into a worldwide religion called Scientology. Here's a look at some of the church's famous followers.