I think quite often, being on the new set is not what you expect. The most serious film can be the most fun. The one that's supposed to be fun can be the most serious. I don't think there are any hard-and-fast rules. I just think it really depends on your director and what the general vibe is.

It's got to be a challenge but at the same time you have to feel as though you can play them - it's really dangerous to want to be a part of something just because you think it's going to be great. I've been sent plenty of scripts where I've known that it's going to be a great film and a successful one, but I just couldn't convince myself that I was the right person for the part. So, I think you have to be careful with that.

As an actor I've been attracted to the sort of films that I want to go and see. That tends to usually be drama-related.

At the beggining of my career, for me the comedy circuit was a combination of desperation and the fact that it was something I could do. I sort of meandered and really had no idea what I was going to do with my life. I had a go at stand-up, and I was sort of okay at it. I'd say I'm the opposite of someone that has the urge to stand in front of strangers and make them laugh, but the idea of getting up and telling a story and people finding it amusing always appealed to me. So I'd say it was probably more about that than anything.

I've worked with some of the great cinematographers. So I'm always watching what they do and I'm watching how the director composes his shots, just because I find it interesting as an actor; you're trying to help them out as well.

Abs are for people with no friends.

There's a plethora of wonderful documentaries. I made a point of not looking at anyone else's portrayal of Henry because I think it would have been too confusing - so I've got a lot of films to look forward to.