With Janet Reitman's new book "Inside Scientology: The Story of America's Most Secretive Religion," building up steam, take a look at some of the most well-known, and most surprising, celebrity Scientologists.
The "Cape Fear" actress credits a Scientology rehab program for her sobriety. UPI/Phil McCarten
The FOX News darling and host of "On the Record with Greta Van Susteren" is an active and donating member of the Church. Of note: her sister is forensic psychiatrist Lise Van Susteren -- probably weird considering Scientology's objections to psychiatry. (UPI Photo/Rick Steele)
Alley reportedly joined Scientology after a Scientology treatment program helped her end her dependence on cocaine. UPI/John Angelillo
The "My Name is Earl" star joined Scientology before becoming an actor. Rumor has it his involvement broke up his marriage to Carmen Llywelyn. (UPI Photo/Laura Cavanaugh)
Actress Leah Remini, best known for her role in "King of Queens", has been a long time Scientologist. Remini has also been known to send pamphlets promoting the religion to fans who write to her.