Was high on cocaine during 'Hangover': Tyson

London: Boxer-turned-actor Mike Tyson says he had to struggle a lot while filming his cameo for 'The Hangover' because he was "high on cocaine" during the shoot.

The 46-year-old made an appearance in the 2009 comedy and then he returned in the movie's sequel, 'The Hangover Part II', which released in 2011.

Tyson says he was high on drugs during the first movie and credits his co-stars for helping him cope with the problem, Daily Star reported.

"(During) the first 'Hangover', the guys just had my back so much. 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," he told U.S. TV show 'In Depth'.

"I had the cocaine talk... So 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 (director) and all those guys," he added.

Bradley Cooper, Zach Galifianakis and Ed Helms are all currently filming the third instalment of the franchise and it is said that Tyson is again making his third cameo appearance.