Russell Brand does not hold back talking about what led to his divorce from Katy Perry in 2012.

In the 40-year-old comedian's new documentary, "BRAND: A Second Coming," he says he couldn't handle the celebrity lifestyle that went along with being Perry's husband.

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"Oh my f--king god. I'm living this life of the very thing I detest," Brand says in the trailer for the film. The "Get Him to the Greek" star is heard calling fame and power "bulls--t" as footage of him and Perry walking through a crowd of paparazzi is shown. He says that he didn't want the life of a "vapid, vacuous celebrity."

According to the Daily Mail, another scene in the documentary has Brand admitting to his friend, Stephen Merchant, that after a trip to Africa with Perry in 2010, he realized there was "not a resolution to anything spiritual." He adds that "at some point, to be happy, I'm going to have to walk away."

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Brand married Perry in 2010 and and filed for divorce 14 months later. The 31-year-old pop star told Vogue in 2013 that Brand told her he wanted a divorce over text message.

She also blamed the demise of their marriage on him not being able to handle her being "the boss" on tour.

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"At first when I met him he wanted an equal, and I think a lot of times strong men do want an equal, but then they get that equal and they're like, I can’t handle the equalness. He didn't like the atmosphere of me being the boss on tour," Perry said. "So that was really hurtful, and it was very controlling, which was upsetting. I felt a lot of responsibility for it ending, but then I found out the real truth, which I can't necessarily disclose because I keep it locked in my safe for a rainy day. I let go and I was like: 'This isn't because of me; this is beyond me.' So I have moved on from that."