Daniel Radcliffe gave up drinking because it became "very, very destructive".

The 'Harry Potter' actor - who hasn't touched alcohol since August 2010 - admitted he was "desperately trying" to convince himself that he was a party animal when he hit the bottle.

He explained: "I stopped drinking because it was becoming very, very destructive to me. I was trying to live up to what I thought and 18/19 years old should be doing, in the pursuit of fun.

"Desperately trying to convince myself I was a party animal who loved bringing chaos down on myself, and I did that for . probably three years."

However, the 22-year-old star explained he experienced a moment of clarity following a drink-induced "blackout", which made him realise it was time to give up alcohol altogether.

Daniel added: "I was doing it alone, every day, and had been for quite some time. It was absolutely a problem.

"I woke up, after eight hours of, you know, blackout, not knowing how I'd got home, and just went, 'I think I may have something to deal with here'. And maybe all those people who were telling me I did were right. And I did.

"And with a lot of help from a lot of friends . I haven't had a drink since August 2010."