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Harry Potter star Daniel Radcliffe has admited to a past alcohol addiction spanning several years, but says he hasn't had a drink since August 2010.

In an interview with GQ magazine, the 22-year-old said:

"I became so reliant on alcohol to enjoy stuff. There were a few years there when I was just so enamored with the idea of living some sort of famous person's lifestyle that really isn't suited to me.

Radcliffe said he was lucky his addiction didn't become tabloid fodder.

"I really got away with that because there were many instances when a paparazzi shot like that could have been taken," he said.

Radcliffe says his relationship with his girlfriend, whose identity remains unknown, has improved following his decision to quit alcohol.

Much as he likes to party, have drinks and a nice time, it just doesn't work with him, he said.

"I do that very unsuccessfully. I'd just rather sit at home and read, or talk to somebody that makes me laugh."

Radcliffe said he is keen to succeed in films once the Harry Potter series ends with Harry Potter And The Deathly Hallows: Part II.

"If I can make a career for myself after Potter, and it goes well, and is varied and with longevity, then that puts to bed the 'child actors argument'," he said.

As to the millions that he has earned from the Harry Potter series, he said he will put it to good use.

"The main thing about having money is it means you don't have to worry about it. And that for me is a lovely thing. It's not for fast cars and hookers," he said.