Leah Remini has spoken out about what it's like to grow up in the mysterious church of Scientology.

The former King of Queens actress is one of the most famous celebrities to leave the church, but unlike a lot of Hollywood Scientologists, Remini didn't join the church as adult.

Instead, Remini was brought into the church at just nine years old by her mother, school teacher Vicki Marshall, and she therefore has a unique view on what it's like to be a child in the church.

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Growing up in Scientology: Leah Remini has detailed what its like to be raised in the church of Scientology in a preview clip of her upcoming 20/20 interview

Like mother, like daughter: Leah Remini (bottom right) says she joined the church of Scientology at nine years old, after her mother, schoolteacher Vicki Marshall (top right) became a member

In a a preview of her 20/20 interview, set to air in full on Friday, Remini explained how children are considered almost superior to adults in the church, and how that special treatment can lead them to become self-centered.

‘Because Scientologists view children as spiritual beings, you’re given a lot of responsibility and your ego becomes extremely inflated,' Remini said.

That explanation certainly puts the recent actions of child Scientologists like Jaden Smith into context.

Brooklyn born: Remini was born in Brooklyn, but moved to Los Angeles with her mother at 13 years old. Pictured above in some throwback pictures from her childhood

The son of Will Smith and Jada Pinkett-Smith recently compared himself to Galileo in a bizarre interview with GQ magazine, in which he also said he and his 14-year-old sister Willow were 'scientists'

Remini says the decision to leave came after having her daughter, and realizing that the church could one day alienate them.

'I didn't want to raise my daughter in the church because from what I experienced and what I saw, the church becomes everything, your mother, your father, your everything. You are dependent on the church.

'In 10 years, if I didn't want to be connected to the church anymore, my own daughter [Sophia] would be taught to disconnect from me. I didn't want to create that. I didn't think that would be healthy for her.'

Child Scientologists: Remini says that children raised in the church of Scientology become egotistical, because of all the responsibility the church gives them. Above, Scientologist Jada Pinkett-Smith (center) and her children Willow (left) and Jaden (right)

The church also demands a minimum of three and a half hours commitment every day, seven days a week, she says. There's very little time left for your family.

Since leaving the church in 2013, Remini has become an outspoken critic of the religion, and much of her new autobiography, Troublemaker: Surviving Hollywood and Scientology, is dedicated to her years in the church.

'I feel that people need to understand this has been my whole life,' Remini tells 20/20, 'I want them to understand how it happens.'

Her mother also left the church, and in an appearance on Ellen, Remini said that the two had become closer and stronger because of it.

'I think now that we're gone, we're learning new ways to reconnect with each other. It really has brought us closer together, don't you think?' she said to her mother, who appeared in the crowd at the appearance.

Remini and her mother Vicki Marshall, pictured together above, left Scientology together

Remini says the decision to leave came after having her daughter, and realizing that the church could one day alienate them. Pictured above with her husband and daughter

While Scientologists are taught to cut ties with family members who leave the church, Remini said in an interview with Buzzfeed that her mother was supportive.

'The fact my mother stood by me after all her years in the church totally took away any resentment I may have been harboring,' Remini told Buzzfeed. 'When it mattered the most, my mother was there for me.'

Remini fears more nightmarish repercussions of severing her ties with the church of Scientology and says she may be about to be in the cross-hairs again.

Speaking out: Daily Mail Online has learned that Remini anticipates even more blow back from her expose of the corrupt inner workings of the covert organization in her explosive memoir

The book is to be published by Ballantine Books in November.

Scientology's ruthless indoctrination, she claims. includes blackmail and abuse as well as control over other celebrities like Tom Cruise and Kirstie Alley.

In a previous trailer for her upcoming interview, Remini said: 'Being critical of Tom Cruise is being critical of Scientology itself…you are evil.'

It was a difficult decision to make after 30 years as a devout Scientologist, but she says she was willing to face the church blacklisting her in order to escape it – thanks to the help of her close friend, Jennifer Lopez.

'When you leave, you can leave quietly,' Leah said. 'But If you make a stink in the public world, they call you a Suppressive Person, which means the church has put a stamp on you that says you are bad.

'No one is going to tell me how I need to think, no one is going to tell me who I can, and cannot talk to', Remini told People magazine in 2013 when she left the church.

Leah's mother, husband Angelo Pagan and daughter, Sophia were all practicing Scientologists.

'I'm not about to shut up. We stand united, my family and I, and I think that says a lot about who we are and what we're about.

'We didn't have a choice and there are pretty hard repercussions to leave it', Remini stated in a video clip from her own TLC reality series, Leah Remini: It's All Relative.

Remini labels herself a 'troublemaker' in this hotly anticipated take down of the church and its hierarchy, in what is also an expose of its most famous members that include Tom Cruise, John Travolta and Kirstie Alley.

Kirstie no longer is speaking to her.

When Remini finally walked away, she was branded a 'suppressive person' in church terminology and willingly faced Scientology's attempt to destroy her life.

'As time goes on, you start to lose touch with the real world. The mindset becomes 'Us against them,' she says during the ABC interview.

'The decision to leave is you are giving up everything you have ever known and everything you have worked for your whole life.'

Friends no more: Will John Travolta and his wife Kelly Preston still show the love for Leah after her book comes out? The eight ball says 'Don't count on it'

Stars: Tom Cruise, Kelly Preston, John Travolta and Kirstie Alley listen to actress Jenna Elfman speak at a Church of Scientology event

But Remini, who was brought into the church as a child by her mother, viewed it as destroy or be destroyed.

The actress has attempted to raise her profile following the break with the church by appearing on Dancing with the Stars and with her own TLC reality show, It's All Relative.

She anticipated the onslaught of negative publicity from the church and it came.

Desperate to hold onto her family and friends, she realized she had to make a clean break because the church was taking over her life.

Her family and friends were instructed to disconnect from her forever because she had now become a 'Suppressive Person' in their vernacular. She wasn't leaving quietly.

Worried: Remini became disturbed about the whereabouts of Shelly Miscavige, the wife of David Miscavige, the head of the Church of Scientology. She filed a missing persons report but the LAPD called it 'unfounded'

The pressure by the church was intense but she had no choice if she didn't want to lose her daughter to Scientology.

That wasn't an option.

'I'd seen a lot of crazy s**t, like crazy s**t. Like it really goes back to when I was seven years old', Remini said on It's All Relative.

Actress Kirstie, a Scientologist since 1979, bizarrely called Remini 'repulsive' and 'a bigot', going after her in an interview on Howard Stern's Sirius XM radio show.

Alley told Stern that she had now reached the OT-7 level in the church, 'an awareness level', 'less insanity'. But that so-called new awareness didn't reflect in her critical attack of Remini who had helped raise a lot of money for the church.

In the past years, Remini has been disturbed about the whereabouts of Shelly Miscavige, the wife of David Miscavige, the head of the Church of Scientology, who has been seen only once since 2006. Remini filed a missing persons report but the LAPD called it 'unfounded'.

Remini had confronted Miscavige in 2005 at the lavish wedding of Tom Cruise and Katie Holmes at the Odescalchi Castle on the shores of Lake Bracciano, Italy, just outside Rome.

Afterward, back in the States, Remini says she was was subjected to what is called 'Security Checking', months of interrogations and behavior modification at Scientology's Flag Land Base in Clearwater, Florida.

The interrogations continued until the actress agreed to drop the complaint, she says.

The treatment was brutal and Remini says she was billed $300,000.