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!

On the whole, British actors star in theater, and I think there's something quite grounding about that.

The Railway Man was a particularly intense and immersive experience. I definitely got carried away. I lost about 35 pounds. I really was incredibly skinny and also quite unwell while we were filming. It wasn't very healthy. I don't recommend it. But then also doing the torture scenes, the water boarding stuff, there wasn't really any other way just to do it really.

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.

There's nothing nicer than coming back to your village, where people like my mum's friends take the mick out of me. I prefer that to the craziness of Hollywood.

My bedroom's like an armoury.

I think that among my friends I'm known as being a hard worker; I think if you want to be an actor, there can't be any compromise. You have to work all day, every day. It's not a 9-5 job. There's always something to learn.