Former boxing champion, Mike Tyson has admitted that he accepted his cameo role in hit movie 'The Hangover so that he could pay for his "drug habit".

In the 2009 comedy the 44-year-old starred as himself while singing Phil Collins's song, 'In The Air Tonight'.

In an interview with Gridlock, he said: "I was doing that to supply my drug habit… I said, 'Wow, This is going to be really good. We're going to sell this stuff on 42nd Street on bootleg and make a lot of money'.

"This is my best thinking on drugs… It wasn't that way. It was an international success."

Tyson also revealed that he has now been sober since his four-year-old daughter died last year.