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.
The "Dharma and Greg" actress is an outspoken member of the Church, and has staunchly defended it in mainstream media. (UPI Photo/Jim Ruymen)
After her divorce from Fred Armisen, rumors abounded that the "Mad Men" star's adherence to Scientology was to blame. Moss has vehemently denied the rumors. UPI /Laura Cavanaugh