Scientology's stars: Which celebrities practice the religion? Tom Cruise and Katie Holmes arrive for the UK premiere of the film "Valkyrie" on January 21, 2009, in London. (CBS News) Tom Cruise and Katie Holmes' split has catapulted Scientology into the headlines again. Both Hollywood stars have subscribed to the religion for years, but now TMZ reports that Holmes is seeking sole legal custody of their daughter because she doesn't want Cruise to control decisions relating to religion. Pictures: Scientology's Stars Read more: Katie Holmes steps out after split Read more: Inside the divorce filing Cruise and Holmes aren't the only celebrities who practice Scientology. John Travolta and his wife Kelly Preston, Kirstie Alley, singer Beck, actress Leah Remini and "Mad Men" star Elisabeth Moss also follow it. But some stars have abandoned the Church in recent years. Filmmaker Paul Haggis resigned from the church in 2009 out of anger over the its implicit support of California's Proposition 8, the ban on same-sex marriage. Developed by L. Ron Hubbard, Scientology is described as "a religion that offers a precise path leading to a complete and certain understanding of one's true spiritual nature and one's relationship to self, family, groups, Mankind, all life forms, the material universe, the spiritual universe and the Supreme Being," according to its website. Go here to see the other stars who subscribe to Scientology.