Here is a list:
Kirstie Alley, actress
Anne Archer, actress (her son, Tom Davis, runs the Los Angeles celebrity center)
Lynsey Bartilson, actress
Catherine Bell, actress
Mary Bono, congresswoman
Sonny Bono, artist and congressman (claimed Catholicism on campaign biographies)
Rufus Buck, folk singer
David Campbell, musician
Nancy Cartwright, voiceover artist, most famous as the voice of Bart Simpson
Sharon Case, actress
Kate Ceberano, actress and musician
Erika Christensen, actress
Chick Corea, musician
Tom Cruise, actor (formerly Catholic, according to Parade)
Sky Dayton, founder and Chairman of the Board of EarthLink
Jason Dohring, actor
Jenna Elfman, actress, formerly Catholic, and her husband Bodhi, actor
Soleil Moon Frye, actress
Brent Graber, voice of 'Otis' in movie 'Milo and Otis'
Zachary Goertz, actor
Paul Haggis, director
Beck Hansen, musician
Isaac Hayes, musician, actor, and (formerly) voiceover artist ("Chef (South Park character)")
Katie Holmes, actress, introduced to Scientology by fiance Tom Cruise
Nicky Hopkins, musician
Mark Isham, musician
Terry Jastrow, TV producer and director (married to Anne Archer)
Mike Joubert, Bronson Pinchot's voice coach
Cyprien Katsaris, musician
Chaka Khan, singer
Jason Lee, actor and professional skateboarder
Paul Leland, magician
Geoffrey Lewis, actor
Johnny Lewis, actor
Juliette Lewis, actress
Peggy Lipton, actress
Nathan Luksa, The Bus Stop
Christopher Masterson, actor
Danny Masterson, actor
Lisa McPherson, died at Fort Harrison Hotel
Peter Medak, director
Jim Meskimen, actor and improviser
Sofia Milos, actress (CSI: Miami)
Elisabeth Moss, actress
Floyd Mutrux, writer, director and producer
Haywood Nelson, actor
Corin Nemec, actor
Marisol Nichols, actress
Judy Norton, actress and musician
Brandy Norwood, actress and singer
Eduardo Palomo, actor, and his wife Carina, actress and musician
Don Pearson, 'Management by Statistics' consultant
Michael Pena, actor
Bernadette Peters, actress and singer (source: Bergen Record 3/10/1985, may be an ex-member)
Jeff Pomerantz, actor and founder of Hollywood Says No to Drugs
Lisa Marie Presley, singer and daughter of Elvis
Priscilla Presley, actress and wife of Elvis
Kelly Preston, actress and John Travolta's wife
Leah Remini, actress
Giovanni Ribisi, actor
Marissa Ribisi, actress, wife of Beck Hansen, sister of Giovanni Ribisi.
Carina Ricco, singer, actress and composer
Michael D. Roberts, actor
Mimi Rogers, actress -- believed to not be active in the church anymore, but still holds the beliefs
Ileana Ros-Lehtinen, Congresswoman
Gloria Rusch-Novello, singer, writer and actress
Pablo Santos, actor
Meghan Schlinder, swimsuit model
Kristin Schwing, actress
Jeffrey Scott, writer for TV cartoons
Billy Sheehan, rock bassist
David Singer, chiropractor, 'Management by Statistics' consultant
Reed Slatkin, criminal ponzi scheme perpetrator
Michelle Stafford, actress
Ethan Suplee, actor
Patrick Swayze, actor
Greta Van Susteren, host of On the Record with Greta Van Susteren on FNC
John Travolta, actor
Josh Wiener, actor
Edgar Winter, musician
David Wittig, CEO
Bryan Zwan, founder of Digital Lightwave, inventor of fiber-optic testing equipment
Eric C. Hadley, Computer Software Developer
Scarlet's Remains/45 Grave is on like a flipped light switch! And a win goes to
coffeecomplaint for their comment yesterday.