* Kirstie Alley, actress, winner of 2 Emmys, 2 People's Choice Awards, and a Golden Globe Award
* Anne Archer, actress (her son, Tom Davis, runs the Los Angeles Celebrity Centre)
* Jennifer Aspen, actress
* James Stacy Barbour, Broadway actor
* Lynsey Bartilson, actress , raised Scientologist
* Beck, musician, winner of 3 Grammy Awards, raised Scientologist
* Catherine Bell, actress
* Karen Black, actress
* Sonny Bono (deceased 1998), musician and member of U.S. House of Representatives (R-Palm Springs)
* David Campbell, musician, composer, arranger
* Nancy Cartwright, voice over artist, most famous as the voice of Bart Simpson, for which she won an Emmy
* Kate Ceberano, actress and musician, People's Choice Award winner
* Erika Christensen, actress, raised Scientologist
* Chick Corea, musician, winner of multiple Grammy Awards
* Tom Cruise, actor, winner of 3 Golden Globe Awards
* Sky Dayton, founder and Chairman of the Board of EarthLink
* Doug Dohring, ex-owner of Neopets
* Jason Dohring, actor from Veronica Mars, raised Scientologist
* Bodhi Elfman, actor
* Jenna Elfman, actress, most famous for Dharma and Greg, for which she won a Golden Globe
* Richard Elfman, writer and director
* Doug E. Fresh, actor and musician
* Kenton Gray, car and motorcycle race driver
* Ryu Goto, noted violin virtuoso
* Paul Haggis, director, Academy Award winner
* Isaac Hayes, musician and actor, winner of an Academy Award and 2 Grammy Awards. Was the voice of "Chef" on South Park
* Katie Holmes, actress (born and raised Catholic), introduced to Scientology by Tom Cruise while they were dating.
* Nicky Hopkins, musician who performed with the Grateful Dead, the Rolling Stones, Jefferson Airplane, and others (deceased 1994)
* Tyler Hynes, actor
* Mark Isham, musician
* Milton Katselas, acting teacher
* Jason Lee, actor ("My Name Is Earl", "Mallrats") and professional skateboarder
* Geoffrey Lewis, actor
* Johnny Lewis, actor
* Juliette Lewis, actress, singer
* Christopher Masterson, actor from Malcolm in the Middle, raised Scientologist
* Danny Masterson, actor from That 70's Show, raised Scientologist
* Lisa McPherson, American woman whose death has been a source of controversy for Scientology
* Jim Meskimen, actor and improviser
* Julia Migenes, American soprano opera singer
* Sofia Milos, actress (CSI: Miami)
* Haywood Nelson, actor
* Corin Nemec, actor (played Jonas Quinn on Stargate SG-1.)
* Marisol Nichols, actress ("24")
* Judy Norton, actress and musician
* James Packer, the 2nd richest man in Australia
* Eduardo Palomo (deceased 2003), actor
* Don Pearson, 'Management by Statistics' consultant
* Michael Pena, actor
* David Pomeranz, singer/songwriter, Emmy Award winner
* Laura Prepon, actress
* Lisa Marie Presley, singer, Michael Jackson's ex-wife, and daughter of Elvis Presley
* Priscilla Presley, actress and ex-wife of Elvis Presley
* Kelly Preston, actress and John Travolta's wife
* Leah Remini, actress
* Patrick Renna, actor
* Ernie Reyes, Jr., actor
* Giovanni Ribisi, actor, raised Scientologist
* Marissa Ribisi, actress, wife of Beck Hansen, sister of Giovanni Ribisi, raised Scientologist
* Ruddy Rodriguez, actress
* Pablo Santos, actor (deceased 2006)
* Billy Sheehan, rock bassist
* David Singer, chiropractor, 'Management by Statistics' consultant
* Reed Slatkin, criminal Ponzi scheme perpetrator
* Michelle Stafford, actress, winner of 2 Emmy Awards
* Ethan Suplee, actor
* John Travolta, actor, Golden Globe Award winner
* Greta Van Susteren, host of On the Record with Greta Van Susteren on Fox News Channel
* Persia White, actress
* Edgar Winter, musician

Former Scientologists

* Kate Bornstein, transgender author, playwright, performance artist and gender theorist.
* John Brodie, football player
* William S. Burroughs, author, Beat Generation icon (later denounced Scientology)
* Diana Canova, actress
* Robert and Mary Anne de Grimston, founders of The Process Church of The Final Judgment
* Werner Erhard, founder of est
* Philip Gale, MIT student and primary developer of EarthLink's innovative ISP software; committed suicide on Hubbard's birthday
* Chaka Khan, singer
* Charles Manson
* Van Morrison, singer, songwriter
* Dini Petty, Canadian television and radio host (quit in the mid-eighties, said the organization had become "pretty much money-oriented")
* Christopher Reeve, actor
* Mimi Rogers, actress (former member- introduced Tom Cruise to the religion)
* Jerry Seinfeld,comedian ("took a couple courses a number of years ago")