Actor John Travolta became a Scientologist in 1975 and has been one of the faith's strongest supporters. Stephen Lovekin/Getty Images

Tom Cruise's 2012 split with Katie Holmes triggered lots of questions about any role that Cruise's status as a Scientologist played in the divorce. The church issued this statement about the issue. Kevin Winter/Getty Images

In 2010, actress Kirstie Alley told CNN's Larry King that Scientology, her faith for three decades, helped her lose weight. Jason Kempin/Getty Images

Former Fox News host Greta Van Susteren (now with MSNBC) joined Scientology after marrying her Scientologist husband, attorney John Coale, in the 1980s. Paul Morigi/Getty Images for Edge Health

Nancy Cartwright, a high-profile member of the Church of Scientology, is also the voice of Bart Simpson on the animated series "The Simpsons." David Livingston/Getty Images

Actress Jenna Elfman is best known for her starring role in the TV sitcom "Dharma and Greg." Noel Vasquez/Getty Images

Actress Juliette Lewis defended Scientology and fellow proponent Tom Cruise after his 2012 divorce. Pascal Le Segretain/Getty Images

Beck came into the spotlight in the '90s with his breakthrough single, "Loser." Emma McIntyre/Getty Images for CBS Radio

Actress Anne Archer was nominated for an Academy Award for her role in the 1987 movie "Fatal Attraction." Rodin Eckenroth/FilmMagic/getty images

Catherine Bell starred in the TV series "JAG" and "Army Wives." Frazer Harrison/Getty Images

Actor Danny Masterson is known for his role in "That '70s Show." Jason Merritt/Getty Images

Actress and model Bijou Phillips wed Masterson in 2011. Paul Archuleta/FilmMagic/Getty Images

When asked about his Scientology faith, actor Giovanni Ribisi said, "It's a personal thing, it's something that works for me, and I think it's that simple." Charles Sykes/Invision/AP

Actress Lynsey Bartilson co-starred in the sitcom "Grounded for Life." Frazer Harrison/Getty Images

Actress Erika Christensen played Julia on the critically acclaimed television series "Parenthood." Toby Canham/Stringer/Getty Images