John Stamos got rejected by the Church of Scientology two years before making his acting debut in 'General Hospital.'

The 'Full House' star attended an introductory session for the controversial faith when he was 17, but his membership didn't last past the first session.

Speaking on the 'Friends In High Places' podcast, he explained that he wanted to join the Church of Scientology after being invited to go by a "hot girl" in acting class and wanting to follow in the footsteps of his acting idol, 'Grease' star John Travolta, who has been a member since 1975.

He said: "I was in an acting class and there was a hot girl, [who] said to me, 'You know we're all meeting at this [place] on Hollywood Boulevard, you should come after [class].'

"I was working at my dad's restaurant at the time and I said, 'Dad, I gotta go.' So, I went and it was the Scientology building.

"Seeing ['Grease'] I was like, 'I wanna be that.' I wanted to be John Travolta, I still do. Well, minus the whatever it is that they do."

However, in the first session, John was introduced to a device known as the 'E-meter', which is made out of two cans and is used to indicate changes in emotional states and to identify levels of spiritual distress, but after being given it, he started playing with it and used it to pretend he was having a conversation on the phone.

He quipped: "I was doing a Peabody and Sherman impression and they didn't like that. Then, I was just f***ing around so much, they said, 'Get out [and] get going.' They just kicked me out."

John previously revealed that he “wouldn’t be here” without the help of his celebrity therapist.

The 60-year-old actor has gone through traumas including a battle with drinking, and was left devastated when his friend Bob Saget – with whom he starred in the classic ‘Full House’ sitcom – died aged 65 in January 2022 after accidentally hitting his head.

He told the New York Post newspaper's Page Six column about how he has been seeing Hollywood’s go-to therapist Phil Stutz: “I probably wouldn’t be here (without him.)"