I ain't the first on the list that people are sending scripts to. I'm very lucky. I've managed to put myself in the position with some directors, yes, who will be calling me directly, and we're working on things and talking about things, but that's on a purely creative level. And then you go and have to deal with the financial level.

Putting on weight is easy all the way through. But after the first couple of weeks, the novelty wears off very quickly, and your body is groaning and starting to really shout at you, saying, 'Why? Why? Why? Why are you doing this?'

Research can be interesting, but it can be pointless as well. The realities of making a movie often are not conducive with that. I'm not knocking it. I love doing research myself, but I admit it doesn't always add to the performance.

I chose to tell a personal story. When you tell a movie like this that's as emotionally charged as this is, it's a risk. As one of my great cinematic heroes, Francis Coppola, would say, "If you aren't taking the highest, greatest risk, then why are you a filmmaker?"

Art is something to be proud of. Art is no compromise. As an actor, you're giving it up, you're at the mercy of so many other people.

You get those occasional moments when you're absolutely calm, and you've just done something that would have scared you shitless earlier that day, and you've just done it like it was nothing. I find that very relaxing.

I went backwards and forwards over it until I was 22. And then in the past few years I began to say to myself, OK, look, I'm not messing around. This is something I want to attack, instead of thinking, I'll just see what happens with it.