Leah Remini left in 2013, citing her frustration with not being able to challenge the church's beliefs and before her daughter was of age to begin "the acclimation into the church."
While married to Tom Cruise, Katie Holmes
was reportedly uncomfortable with Scientology's teachings and didn't want their daughter raised in the religion, especially in light of her own Catholic upbringing.
Nicole Kidman severed ties from the church when she divorced Tom Cruise
In 2009, Paul Haggis
left the church after 35 years in protest of their support of California's Prop. 8, which banned gay marriage in the state.
Lisa Marie Presley left Scientology sometime around 2012 after being raised in the church by her mother, Priscilla Presley.
In 1997 divorce papers, Tom Berenger cited his soon-to-be-ex-wife Lisa's deep-rooted Scientology beliefs as a reason for the dissolution of their marriage.
Christopher Reeve said in his autobiography that he became disillusioned with the religion when auditing failed to detect blatant lies he was telling.
Mimi Rogers is often credited with introducing Tom Cruise
to Scientology, but after their marriage ended, so did her relationship with the church -- though he remains the Church's most active famous member.
A child actor who was introduced to the church by an acting coach, Jason Beghe laughed off Scientology with friend David Duchovny
after he left. While he was an active member, their friendship was strained, and Duchovny was labeled a "suppresive person" by the church.
Jerry Seinfeld never officially joined the church, but has attributed his success partly to some Scientology courses he took in his 20s.
Brad Pitt took a few courses -- and was a high-level target for the church -- while dating Scientologist Juliette Lewis, but lost interest after the relationship ended.
Candice Bergen was briefly involved with the church in the 1960s before its financial rise.
"Transparent" actor Jeffery Tambor took Scientology classes and studied the religion for a short time, but no longer participates with the organization.
Patrick Swayze tried out Scientology while practicing many world faiths, including Buddhism and transcendental meditation.
Russell Crowe read L. Ron Hubbard's book"Dianetics" and watched a few videos before deciding the church wasn't for him.
Columbia Broadcasting Network
Sonny Bono flirted with Scientology while married to Cher, who herself never understood its appeal.
The British Broadcasting Network
"Top Gun" Producer Don Simpson spent more than $25,000 dollars on Scientology before leaving without the life improvement he was hoping to achieve.