Al Pacino doesn't "remember much" of the 70s.
The 'Godfather' star says he struggled with fame during his younger years and admitted he turned to drinking, something he has since overcome.
He said: "I was having difficulty with all the attention.
"I was a drinker, for sure, my career was exploding in the Seventies and, I'm sorry, but I don't remember much of the Seventies. Now when I come to think about it, I don't remember much of the Eighties either.
"I have a little bit more of a grasp of the Eighties. I no longer drink or take drugs or any of that. I haven't done for the past 30 years."
The 75-year-old actor said things changed for him after his good friend, drama teacher Charlie Laughton, confronted him.
He said: "He was the one who said to me, 'Al, I'm not asking you to stop or do anything, but to be aware that you are actually drinking and taking stuff'.
"That awareness started and a year or so later, I decided to give this stuff up. It saved my life."
Al also insisted he has no regrets about his career after he passed on offers to star in the lead roles in 'Die Hard' and 'Star Wars'.
He added to The Sun newspaper: "I don't even think about it. I believe it's luck.
"Sometimes it passes you by and sometimes you catch it. But you've got to get out of the house."