Rupert Grint once got so drunk that he passed out in a graveyard.

The 21-year-old actor - who stars in new comedy 'Wild Target' alongside Bill Nighy and Emily Blunt - admitted he could at times be just as big a party animal as his character in the movie, who wakes up hungover inside a sofa cover in one scene.

He told BANG Showbiz: "I really overdid it once when I woke up in a graveyard. I'd been at my mate's house, we'd been asleep, then there was alcohol involved and we went out.

"A graveyard really isn't the nicest place to wake up!"

Despite his impromptu night sleeping next to the tombstones, Rupert - who is best known for his role as Ron Weasley in the 'Harry Potter' franchise - thinks he has been very fortunate to have managed to keep his partying out of the public eye and not go off the rails in the way many other former child stars have.

Speaking about his 'Harry Potter' co-stars Emma Watson and Daniel Radcliffe - who play Hermione and Harry respectively - he said: "No I'm pretty lucky, I've stayed out of it... We all stayed out of it. We kept quite low-key, that's the way to do it."