The King of Queens actress was raised a Scientologist but left the church in 2013 after disagreeing with policies set out by leader David Miscavige.

Leah has just launched a series attacking the church, titled Leah Remini: Scientology and the Aftermath, which gathers stories from fellow ex-members and former high-ranking Scientologists, and John insists he will not be watching.

The 62-year-old praises the religion for helping him get through major tragedies in his life and he is grateful he and his family are able to practice it.

"It's been nothing but helpful to me for 40 years, through all my losses of my mother, my girlfriend, my son," he told E! News at the Critics Choice Awards on Sunday (11Dec16). "They (Church elders) never left my side, so why would I want buy into something that's not what I feel? As long as I get to still do it and my family gets to do it, I'm happy."

Last month (Nov16), Leah was asked if Tom Cruise or Travolta had reached out to her after she left the religion and she insisted "they are not allowed" to contact her.

"They are not allowed to reach out to me," she told E! News. "John Travolta, by the way, is one of the nicest, sweetest people you're ever going to meet."

"They wouldn't want to reach out to me because what they've been taught is that I mean them harm, that I am an anti-social personality that means them harm, that I literally wake up in the morning and want them to fail in life. That is the mentality," she added.