Chuck Lorre claims the stars of "The Big Bang Theory" were "furious" over a request to cut pay for new cast members.

Chuck Lorre's memoir "Sitcom" recounts the chaotic last day of Charlie Sheen on set, his past in Scientology, and first shows CBS's Melissa McCarthy.

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Chuck Lorre reveals all his secrets in his new memoir.

The prolific television producer and writer has written about his life and decades in the industry in his new memoir, Sitcom, which features thousands of behind-the-scenes stories from some of his most popular TV shows.

Whether it was her final days working with Charlie Sheen, her spat with the network over casting or the actors' shocking refusal to pay salaries, Lorre didn't hold back.

Here are some of the biggest bombshells from his memoirs.

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One of Lorre's most successful comedies is "The Big Bang Theory", which had a large cast.

In his memoir, Lorre recalled bringing on Mayim Bialik and Melissa Rauch at the end of season three and promoting them to series regulars in season four, noting that without them, "the show would probably have run out of gas after seven, maybe eight seasons."

He later recalled that the network was under pressure to increase Bialik and Rauch's episodic fees. Executives Les Moonves and Bruce Rosenblum approached the lead actors, who were making $1 million per episode plus points, to ask them to take a 10 percent pay cut to accommodate the raise.

"I assumed they would quickly agree, you know, all for one, one for all," he wrote. "This aggressive attitude shows appreciation for actors at awards shows. Again, wrong. They were angry that they were even being asked to take a small cut to reward two newer actors. Munoz and Rosenblum had to leave the room because they had scrotal injuries."

Lorre and Charlie Sheen worked together on "Two and a Half Men" for eight seasons before the actor's behavior led to her exit.

In her memoir, Lorre explained that the show was "unviable" for the first seven seasons, but "it all started" during season eight, when Shane "was calling in sick all the time."

"The usual excuse was food poisoning, usually bad shellfish," Lore wrote. There were emergency dental appointments. When I was informed that he would not be attending practice because his BIC lighter exploded and his eyelashes were burned. Another time, his manager bragged to me that he had to fly across the country with a bag full of cash to buy a home sex tape of his client.

Despite his antics, they continued filming the show, with Lorre noting that they were "operating in a constant state of anxiety" not knowing what Sheen was going to do next.

His behavior quickly escalated and it was clear to those around him that his health and well-being were at risk.

"The last scene we shot was with Charlie and Melanie Lynskey," Lorre wrote. "He couldn't remember any of his lines and had to use the furniture to hold himself up. Melanie was horrified. It was clear to everyone that this man we had all fallen in love with was in trouble. I had no choice but to shut down the show."

In her new memoir, "Sitcom," Lorre writes about Charlie Sheen and other actors she's worked with. (D Street Books)

Laure wrote that after refusing to get help for his drug problem and later trashing him on TV, Warner Bros. decided they no longer wanted Sheen in their custody and let him go.

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During his career as a television writer and show creator, he often faced opposition from studio executives when casting actors for his shows.

In his memoir, Lorre explained the casting decisions behind some of the most popular shows of the past few decades, noting that executives initially didn't want to cast Jon Cryer on "Two and a Half Men" or Nayar on "The Big Bang Theory."

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Despite the success of these actors in their respective roles, studio executives once again challenged her when it came time to cast the female lead in Mike and Molly.

"Casting Molly actors like Bajan Cryer is a tortuous journey." "Once again, my brilliant casting director Nikki Valko has delivered a comic genius," he said. Melissa McCarthy. And once again, CBS hated him. Believe it or not, they wanted a hot young woman to play a woman struggling with her weight. It was even suggested by one of the directors—a female executive—that I consider casting a sexier actor and dressing him in a fat suit.

Lore explained that she had learned her lesson at this point and wouldn't take no for an answer, insisting that McCarthy be given the role of "The End of the Debate," adding that "when 'Bridesmaids' came out, I felt so smart."

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Speaking about her life before she made it big as a TV writer, Lorre revealed that she was once part of the Church of Scientology.

He recalls going to the Church of Scientology in Columbus, Ohio, after being invited by a sax player in a bar. He wrote that he "didn't know what Scientology was," but since he had nothing to do and his car was in a junkyard, he decided to go and was quickly taken there with "pretty girls."

Lore explained that she had an out-of-body experience after taking a communication class and sought out the Church of Scientology while in Los Angeles. There he found out that he had been offered a billion-year contract to join the Scientology Marine Organization.

"Now, I didn't want to give up on my dead-end music career, but I was broke, outnumbered," he wrote. I am."

Referring to her marriage to her third husband, Ariel Mandelson, Lorre said entering into a relationship with an age gap was not the best decision.

She explained that when their relationship began, she "convinced myself that age is arbitrary" and that "you're only as old as you think you are" and that "the heart wants what it wants, but over time she came to the conclusion that everyone "turns out to be bulls---" and "sometimes the heart is a fool."

"Age is not only a big gap, it's getting wider with time. No bridge can bridge the gap between Taylor Swift and Bruce Springsteen," he wrote. "The rate of physical and mental decay between sixty and sixty-five is terrifyingly fast. Between thirty and thirty-five, infinitesimally small."

Lorre claimed that she was initially "wary about age" because she was older than Mendelssohn's parents, but whenever she paid attention to him, "she accused me of being 'old'" and added, "She ended up boring me."

He wrote: "After seven years we were both miserable and agreed to separate. Eight months later we went to a wedding together." "The night ended with a split second, followed by a reconciliation, followed by another year of misery. This time we agreed to a divorce. He got the money. I got the dog. I like to think I got the better end of the deal. The dog is always glad to see me."

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