Daniel Radcliffe has opened up about the most personal areas of his relationships, including losing his virginity and how comfortable he feels naked.

The Harry Potter star said he wouldn't do anything different about the first time he had sex and felt lucky compared to some of his friends.

He told US Elle magazine: "I'm one of the few people who seem to have had a really good first time.

"It was with somebody I'd gotten to know well. I'm happy to say I've had a lot better sex since then, but it wasn't as horrendously embarrassing as a lot of other people's were - like my friend who got drunk and did it with a stranger under a bridge."

He added that having struggled with alcohol issues, he now preferred to be sober: "For some people sex might be better drunk, but for me - and the person I'm doing it with - it's much better sober."

Daniel, who has appeared naked on stage in Equus and on screen in new rom-com What If, said he didn't mind having to strip for a role.

He explained: "I mean, I'm fairly comfortable with it. There's something to be said for getting naked onstage when you're 17. I was f***ing terrified then.

"I went out with quite a few girls at that time. I would normally follow that up with, 'Oh, cool, you've seen me naked'."

The Kill Your Darlings actor is now dating actress Erin Darke and admitted that having to stay in touch through Skype because of their busy schedules could be frustrating.

He said: "I'd rather have it than not have it. I always think to myself, If we were alive 100 years ago we'd be getting one letter a year. It'd have to survive assassination attempts to get there."