Nicole Kidman was a member of the Church of Scientology when she was married to Tom Cruise from 1990-2001 but she is reported to have since converted to Catholicism.
Ex-Dawson's Creek star Katie Holmes was a also member of the Church of Scientology, converting when she married Tom Cruise in 2006. However once the couple divorced in 2012 she returned to the Catholic Church.
Demi Moore was reported to have become a member of the Church of Scientology in the early 1980s, but she left when she married Bruce Willis in 1987.
Although never officially a Scientologist, Russell is reported to have studied the Church's teachings. He told Interview magazine: "It just seems like a religion that is perfect for people who feel like they need a grounding."
Actress Mimi Rogers was raised in the Church of Scientology and met her ex-husband Tom Cruise through the organization where she was an auditor. But she has since been reported to have left as of 2012.
Sitcom star & comic Jerry Seinfeld is quoted as saying that he "dabbled" with Scientology in his 20s but never took it up as a belief system.
Lisa Marie Presley
Elvis's daughter, once married to Michael Jackson, was once a member of the Church of Scientology, but she reportedly left the organization in 2012.
Veteran actor and current star of the hit TV series Transparent, Jeffrey Tambor says he dabbled in Scientology in 2007. "I took some classes and studied it for a while but no more," he said.
King Of Queens sitcom star Leah Remini was a member of the Church of Scientology for about 30 years, but she left in 2013 because she had issues with the organization's leaders.
Isaac Hayes, once the voice of Chef on South Park, was an active member of the Church of Scientology until they took issue with his South Park role due to the show's stance on religion. It's reported that the organization severed ties with Hayes over his role.