Tom Hanks has admitted he was a "total idiot" for eating an unhealthy diet when he was younger, which he blames for his diabetes diagnosis.
The Oscar-winning actor, 59, revealed in 2013 that he had been diagnosed with Type 2 diabetes.
He told the Radio Times: "I'm part of the lazy American generation that has blindly kept dancing through the party and now finds ourselves with a malady.
"I was heavy. You've seen me in movies, you know what I looked like. I was a total idiot.
"I thought I could avoid it by removing the buns from my cheeseburgers. Well, it takes a little bit more than that."
However, Tom - who is married to actress Rita Wilson - is hopeful that he can beat the disease.
"My doctor says if I can hit a target weight, I will not have Type 2 diabetes any more," he said.
The actor became a father at 21 and said that starting a family at such an early age meant that he never became a "s**tfaced artist".
Tom, now a father-of-four, said: "I'm lucky. I was in charge of offspring at a very early age, so I didn't have the luxury of being able to get stoned a lot. And I never drank too much. I was never what I call a s**tfaced artist."
The actor said he doesn't regret that because he didn't think it was more fun to be intoxicated or stoned.
"I thought it was more fun just to be seeing what was going on. I did my share, but it didn't become a habit," he said.
This week's Radio Times is on sale from Tuesday, May 17.