Though Leah Remini is no longer a Scientologist, the former King of Queens actress is still majorly publicizing Scientology today by condemning the controversial religion with her A&E show, [Leah Remini: Scientology and the Aftermath]( Since the star’s series has again brought attention to Scientology, we’re taking a look at all the celebrities — including Tom Cruise, Kirstie Alley, and more! — still practicing L. Ron Hubbard’s teachings in 2017. Scroll down to see the list!

Tom Cruise

The Top Gun star was first introduced to Scientology back in 1990 through his first wife, actress Mimi Rogers. After struggling with dyslexia as a child, Tom has reportedly credited the religion with helping him overcome the reading disability. Since joining Scientology, Tom has become one of the organization’s most famous and outspoken members and has worked as an impassioned Scientology advocate for many years.

MORE: Tom Cruise Has a New Girlfriend — Plus See the Actor’s Dating History!

Scientology has also allegedly influenced Tom’s romantic relationships in the past. In 2013, the star claimed his third ex-wife, Katie Holmes, divorced him to protect their young daughter, Suri Cruise, from the religion. Neither Katie nor Suri are practicing Scientologists today.

John Travolta and Kelly Preston

John first joined Scientology in 1975 after he was given the book Dianetics while filming the movie The Devil’s Rain in Mexico. The Grease star’s wife is thought to have joined the religion when she met her now-husband John in 1987.

When John and Kelly tragically lost their son Jett at age 16 in 2009, the actor spoke out about how Scientology helped him cope with his child’s death. “Oh, my god, I wouldn’t have made it [without the church’s support]. Honestly. The truth is, I didn’t know if I was going to make it. Life was no longer interesting to me, so it took a lot to get me better. I will forever be grateful to Scientology for supporting me for two years solid, I mean Monday through Sunday,” he said.

MORE: Tom Cruise is “Freaking Out” Over Leah Remini’s Scientology Tell-All (REPORT)

Kirstie Alley

The former Cheers star was raised as a Methodist but became a Church of Scientology member in 1979. Kirstie reportedly joined the religion to help her overcome a cocaine addiction and subsequently completed a Scientology-affiliated drug treatment program. Since then, she has continued her Scientology training, once allegedly donated $5 million to the church, and has spoken out against former friend Leah’s public criticism of Scientologists.

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Jenna, John, and Kelly at a Scientology event in 2013. (Photo Credit: Getty Images)

Juliette Lewis

The actress interestingly identifies herself as both a Christian and a Scientologist. “I think there’s so much confusion because people don’t understand a religion where you can be another religion but you can still practice Scientology. That’s why it’s completely progressive. It’s just tools for living. It’s about understanding one’s self and others and compassion and how to communicate better and how to live in this troubled society. It’s really basic, common sense stuff. It has nothing to do with all this funny folklore that surrounds it. You could be a Jewish Scientologist or a Buddhist Scientologist or a Christian Scientologist or anything else,” Juliette said in a 2010 interview.

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The entrance to LA’s Scientology Celebrity Centre. (Photo Credit: Getty Images)

Jenna Elfman

Jenna was born a Catholic and became a Scientologist when she met her husband, actor Bodhi Elfman — who first practiced Judaism — in the early 1990s. The actress has since credited Scientology with sustaining her marriage to Bodhi. After Leah left Scientology in 2013, Jenna took to Twitter to defend her accociation with the religion and denounce Leah’s statements against the organization.

MORE: Leah Remini Reveals the Best Thing About Leaving the Church of Scientology

“What is important to me? I give a damn about making the world a better place. I care about seeing others smile with genuine happiness. I think the world needs more of that. I’m not interested in sensationalism. I’m interested in seeing other people do well. And spreading kindness, warmth, and sincerity. I never forget to appreciate the absurd. And I find it uplifting to admire what’s right in others. I also find it pleasurable to be totally ridiculous,” she wrote at the time.