Mike Tyson has confessed to being high on cocaine while shooting his cameo for The Hangover.

The former heavyweight champion agreed to play a heightened version of himself in the comedy movie, which sees him knocking out Zach Galifianakis' character Alan and having his tiger stolen.

Tyson has since admitted that he took on the role in order to fund his drug habit and credited his castmates with helping him fight his addiction.

"[During] the first Hangover, the guys just had my back so much," the 46-year-old told Yahoo! Sports. "They carried me real good. I was a mess. I was overweight. I was a pig, high on cocaine. They had to know I was messed up. I couldn’t talk. I had the cocaine talk. Those guys are just beautiful people. They had my back, and I appreciate that and stuff, then they asked me to come back (for the sequel) and I guess I am thankful to (the director) and all those guys."

In 2007, the athlete was found guilty of possession of cocaine and driving under the influence. The year before, he had checked into rehab following a similar arrest.

The movie, which went on to become the highest-grossing R-rated comedy in the United States, spawned two more movies, the first of which Tyson appeared in. He did not make an appearance in the third instalment.

Back in 2013, Tyson appeared on In Depth With Graham Bensinger, where he reportedly told the producers he had only signed on for the role to "supply his drug habit".

Tyson also told Besinger about his relationship with his ex-wife Robin Givens, who had filed for divorce three months into their marriage, alleging spousal abuse. She reportedly received a divorce settlement of over $10million.

"I was doing a divorce but every day, before I would go to my lawyer's office to say, 'She's a pig and stealing,' I would go to her house to have sex with her," he told Bensinger.

Mike Tyson has confessed to being high on cocaine while shooting his cameo for The Hangover.

The former heavyweight champion agreed to play a heightened version of himself in the comedy movie, which sees him knocking out Zach Galifianakis' character Alan and having his tiger stolen.

Tyson has since admitted that he took on the role in order to fund his drug habit and credited his castmates with helping him fight his addiction.

"[During] the first Hangover, the guys just had my back so much," the 46-year-old told Yahoo! Sports. "They carried me real good. I was a mess. I was overweight. I was a pig, high on cocaine. They had to know I was messed up. I couldn’t talk. I had the cocaine talk. Those guys are just beautiful people. They had my back, and I appreciate that and stuff, then they asked me to come back (for the sequel) and I guess I am thankful to (the director) and all those guys."

In 2007, the athlete was found guilty of possession of cocaine and driving under the influence. The year before, he had checked into rehab following a similar arrest.

The movie, which went on to become the highest-grossing R-rated comedy in the United States, spawned two more movies, the first of which Tyson appeared in. He did not make an appearance in the third instalment.

Back in 2013, Tyson appeared on In Depth With Graham Bensinger, where he reportedly told the producers he had only signed on for the role to "supply his drug habit".

Tyson also told Besinger about his relationship with his ex-wife Robin Givens, who had filed for divorce three months into their marriage, alleging spousal abuse. She reportedly received a divorce settlement of over $10million.

"I was doing a divorce but every day, before I would go to my lawyer's office to say, 'She's a pig and stealing,' I would go to her house to have sex with her," he told Bensinger.