Tom Cruise and John TravoltaThe Church of Scientology -- more famous for attracting celebrities than for its actual beliefs -- has experienced a bit of a publicity nightmare as of late. After 35 years, two-time Oscar winner Paul Haggis ('Crash') exited the group due to its anti-homosexuality stance. France declared the organization guilty of organized fraud. And Will Smith and wife Jada Pinkett Smith -- who have donated money but say they are not Scientologists -- recently came under fire for instituting the Study Tech teaching methodology (developed by Scientology founder L. Ron Hubbard) in the New Village Leadership Academy they founded.

So who among Hollywood's A-list can wield their celebrity clout in the church's time of need? Here we track Scientology's biggest devotees.
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