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

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 used to do a lot of comedy. I don't know what happened. I think it's my face.

I've got four kids to feed and a wife to provide for. It's a worry but a great responsibility as well and one I relish.

Mike Leigh taught me about making choices - as an actor, you choose between being honest and clever, and with Mike, it's always about being honest. I learned how to behave on a film set from Jim Broadbent. He was a great example of someone with a fantastic career who kept his feet on the ground.

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'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.