Actress KATIE HOLMES and hubby TOM CRUISE holding hands as they are leaving their apartment to go see the play South Pacific at Lincoln Center in New York City....

(Photo by Flynet Pictures)





Everyone knows that Tom Cruise and John Travolta are into Scientology in a very big way--they're pretty open about their love for Dianetics.

Other celebrity Scientologists, however, aren't quite so vocal about their philosophical leanings--and with good reason. Despite the time and money that the Church of Scientology (COS) has very publicly thrown into substance-abuse rehabilitation programs and urban renovation, Scientology is still often portrayed negatively in the press, its adherents mocked for their belief in "psychic trauma" caused by the murder of our alien soul-ancestors (yeah).





Still Scientology continues to grow, probably in large part due to their celebrity following. Scientology founder L. Ron Hubbard created "Project Celebrity" during the religion's early stages as a means of disseminating his teachings to the broad public. Here are ten of the most surprising celebrity Scientologists.



10. Beck Hansen



What do Danny Masterson, Erika Christensen, and Beck have in common? Getty



Beck and wife Marisa Ribisi.



Sea Change Album Cover designed by Jeremy Blake linked from blog.dada.net



9. Erika Christensen

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Actress Christensen calls Tom Cruise her "spiritual mentor."





8. Giovanni Ribisi

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7. Julliete Lewis

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6. Laura Prepon

Actress Laura Prepon poses during the New York rescue workers detoxification project charity event held at Geisha House on March 27, 2008 in Hollywood, California.

(Photo by Michael Buckner/Getty Images Entertainment)







Laura and Christopher Masterson.



won hearts as blunt tomboy Donna Pinciotti on That 70's Show. The formerly redheaded actress was one of TV's most popular leading ladies for eight years, until the show's finale in 2006. She's also a Scientologist.



After her breakup with co-star Topher Grace

, Prepon started dating her castmate Danny Masterson's brother Christopher, also an actor (you may remember him as the oldest brother on Malcolm in the Middle). The Mastersons were raised into Scientology, and Laura herself converted as a result of her relationship.





Prepon and Masterson broke up last year, but she's still spotted going to the LA Scientology Center all the time. Laura doesn't talk about Scientology in interviews, probably because she's worried it will affect her career. She last appeared on the series October Road, which was cancelled in May 2008.



5. Bijou Phillips



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Bijou with the Masterson brothers.



4. Jason Lee

Actor Jason Lee arrives at the DVD release party and charity concert event for 20th Century Fox's 'Alvin and the Chipmunks' held at the El Rey Theater on March 27, 2008 in Los Angeles, California.

(Photo by Alberto E. Rodriguez/Getty Images Entertainment)





Cruise and Lee on the set of Vanilla Sky.







3. Nancy Cartwright (aka Bart Simpson)

Actress Nancy Cartwright arrives to the American Idol Season 6 Finale held at the Kodak Theatre on May 23, 2007 in Hollywood, California.

(Photo by Kevin Winter/Getty Images Entertainment)













2. Efren Ramirez

Efren Ramirez attending the N9NE Group and the Palms Casino Resort's 2nd Annual 'A Midsummer Night's Dream' at the Palms Pool and Bungalows in Las Vegas.

(Photo by Flynet Pictures)





With Scientologist Erika Christensen.



1. Sonny Bono

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Although raised into Scientology, musician Beck managed to keep his affiliation with L. Ron Hubbard's organization under wraps until around 2007, when speculation about the suicides of writer Theresa Duncan and artist companion Jeremy Blake began to make news.Both Duncan and Blake had ties to Beck: Blake designed the cover of Beck's 2002 album Sea Change, while Duncan had stated in 2003 that Beck was going to be in a movie she'd written called Alice Underground. For whatever reason the relationship between the couple and Beck soured, and the movie never happened. Duncan stated in a blog post that she was being harassed by the Church of Scientology, and that the harassment had begun after Blake's work for Beck.Beck does not often speak publicly about his religion, but has said that he'd have "nothing but positive things to say about [Scientology]. He's a frequent donator to the COS, and is married to fellow Scientologist Marisa Ribisi , sister to Giovanni Ribisi Actress Erika Christensen, like Beck, was raised into Scientology in Los Angeles.Erika attended Delphi Academy, a private school in Los Angeles that uses the Study Tech educational methodology created by Scientology founder L. Ron Hubbard. There are other Church of Scientology-affiliated Delphi Academies throughout the country, but only the LA location offers high school diplomas. The Delphi Academy Christensen attended does not advertise its connection to the COS, and critics of the Church claim that the school is a minority recruitment tool. Christensen has been open about her Scientology background, and has told interviewers that she considers Tom Cruise her spiritual mentor. Somehow, she's managed to escape the criticism Tom regularly faces for his religious beliefs. Maybe it's because she barely has a career."Without Scientology, I would be in an alley somewhere looking for dope." -Giovanni Ribisi Actor and porn-stache enthusiast Ribisi was also raised a Scientologist. It's the cool kids' club in LA, apparently. His sister Marissa is married to Beck. Giovanni Ribisi is playing "Cebolo" in Spirit of the Forest as well as starring in the folllowing well-edited YouTube video:Actress Juliette Lewis has a sister named Lightfield. Does it really surprise you that she's a follower of Xenu? She too was raised a Scientologist in Los Angeles; her father, actor Geoffrey Lewis, was one of Hollywood's earliest Scientology converts.Juliette is very open about her membership in the Church of Scientology. In a book called What is Scientology, she's quoted as saying, "I am no longer stuck in the bottomless pit of despair and apathy. Having achieved the state of Clear is the single most important thing I've done for myself. It has allowed me to experience life in a way I only imagined."Juliette had a pretty public drug problem in the early 90's. She credits Scientology and, more specifically, their drug rehabilitation program Narconon with helping her to kick her habit.Celebrity spawn Bijou Phillips is an actress, model, guitarist, and songwriter, but you probably know her best for taking off her clothes. She appeared nude in Playboy back in 2000 at the ripe old age of 20. Yup, she's a Scientologist.It wasn't always this way. Dad John Phillips of the Mamas and the Papas did not raise her into Scientology: Bijou split her childhood between New York and South Africa (her former-model mom's homeland). She legally emancipated herself from her parents at 14, living alone in New York City, making money modeling. After several years of hardcore partying, she landed in rehab after one of her close friends died of a heroin overdose.These days Bijou is dating former That 70's Show actor Danny Masterson, a lifelong Scientologist. She frequents Scientology-sponsored events in his company, and is open about her affiliation with the COS.My Name is Earl actor and former professional skateboarder Jason Lee has had a busy summer: his fiance, model Ceren Alkac, gave birth to a baby girl (Lee has a son named Pilot Inspektor, 4, with ex-fiance Beth Riesgraf), and he applied for a marriage license. He also kept up his duties on the Board of Advisors of the Church of Scientology's Citizens Commision on Human Rights, which mostly attacks psychiatry as a 'pseudo-science." He is so into Xenu.Lee has said in interviews that he has been studying Scientology since before he started acting (his first film role was in 1991), although there were rumors that he joined the COS after working with Tom Cruise on the set of Vanilla Sky, around the time he and his ex-wife Carmen Llewelyn divorced.Tom Cruise a Scientology recruiter? Color me shocked. Nancy Cartwright , the actress who has provided the voices of Bart Simpson, Ralph Wiggum, and several other characters on The Simpsons for over twenty years, donated $10 million to the Church of Scientology in 2007. That's almost twice her annual salary. What a devotee!Cartwright joined the COS in 1989 and reached the "Clear" level in 1991, which in Scientology-speak means she's wiped clean of all psychic trauma left over by ghost aliens. Because, you know, all our problems exist because of trauma that happened thousands of years before our births. Alien ghost trauma. Wow. Efren Ramirez may not be a household name yet, but he's certainly an indie film favorite. He played soft-spoken Pedro in Napoleon Dynamite, the kid who baked a cake to ask a girl out and shaved his head when he got hot. Do you think he'd be upset if we bashed a pinata in the shape of Xenu?The answer, my friends, is yes. The up-and-coming (hopefully!) actor has not been particularly vocal about his affiliation with the COS, but he has appeared several times at Church of Scientology functions, like the Scientology Christmas Stories event. Don't you want to know what Scientology's Christmas stories are? I would totally pay to have Tom Cruise recite his version of "The Xenu Before Christmas."Little-known fact: at the time of his death, Sonny Bono was a Scientologist.The former actor represented California's 44th district in the House of Representatives, and likely kept his affiliation with the Church of Scientology quiet for political reasons: he listed himself as Roman Catholic on all websites, campaign materials, and official documents.Bono and third wife Mary started attending Scientology courses at the urging of famous Scientologist Mimi Rogers ---who notably converted Tom Cruise when they were married in the 1980s. Interesting, huh?The news that he was a Scientologist still doesn't tarnish his magnificent performance in 80's classic Troll.