It was a movie [The Railway Man] that stayed with me a long time. It's still one of the things I'm most proud of. I got to know the man that I was playing and unfortunately he passed away just before the movie came out. It's one that meant a huge amount to me, and one that I'm particularly proud of.

I think camping is one of those things where if you're forced into it as a child, you'll probably hate it as an adult.

I've been very reluctant on the Twitter front. But I do Instagram now, so I'm slowly coming around. I'm quite a private person, so much of what I do for my job means that I have to be quite public so I'm just nervous about everything being public. I might turn around. Three years ago, I was against all social media but I actually really enjoy Instagram now. Who knows? I never say never!

Nearly every taping or audition has to be in an American accent, so you don't have a choice; you just have to get good at it. I'm sure you can appreciate accents - it's like learning any skill, you have to work at it and work at it and it takes an awful lot of time, until it's muscle memory and you don't have to think about it anymore.

I went to an all-boys school and hated feeling like one of the crowd.

People expect your life to change completely. The main difference is I can get work now. I can do my hobby as a job. It's great. It's a privilege. But in terms of the rest of the stuff, I still got all the same group of friends I always had. I don't do anything different. We still go to the same dirty bars and do the same things. So nothing really changes.

Each year we go to the Cannes film festival and I tend to have all my friends pile in the back of my car and we'll drive from London. The poor production company think they're only putting me up and suddenly they've got eight people sleeping on my hotel room floor.