I'm used to being in front of camera and knowing what to think. But if you're asking me to be me, I get very self-conscious. My job isn't to be me. Being an actor, people think you can do a eulogy at a funeral, a speech at a wedding. I find all that very nerve-racking.

When I think of character actors, I think of Spencer Tracy; I think of Gene Hackman, Robert Duvall. When I was a young lad watching films, my eyes were on them - watching 'On the Waterfront,' my eyes are on Rod Steiger and Karl Malden, not on Brando.

I sometimes think if I had gone to Oxford or Cambridge and looked like a handsome young guy who could be in an Evelyn Waugh novel or something, I'd be a massive movie star. But there's a longevity to what I do. It's more reliable. Someone isn't deciding that I'm the next big thing.

The trick to acting is not to show off; it's to think the thoughts of the character. I was lucky because when I started acting, it was doing jobs above pubs. I learned to act in anonymity, so by the time people saw me, I knew what I was doing. I was crap for years, but no one saw me being crap. It's a trade you learn.

I wanted to work with Bryan Singer because I like his films.

I went swimming the other day and my wife was watching and she said: "You know, it's funny, it's when you've got no clothes on, no one recognises you." I said: "What are you saying? That I should do more love scenes?"

I consciously decided not to be a 'London' actor. Those gangster movies made a lot of East End actors think they were movie stars. And I was very aware that they were going to go out of fashion.