Once you click into a character, to a certain degree, you can do a lot else. You can do other stuff, then come back and click right into the character. It's sort of funny that way, the way the mind works. Once it's there, it's sort of there. For the stage, for example, all through the day, you're not onstage. You're living your life, la-la-la, then the lights go down, then boom! All of a sudden, you're in this thing. There's a kind of reflex muscle trigger that happens, and all of a sudden you're back into the role. It's just getting there in the first place that's tricky.

I remember being very affected by what was going on there towards the end of Apartheid. And the subject is still very pertinent, politically, to what's happening around the world today, in terms of negotiating peace talks. I had always been interested in this period of change in South Africa, generally, for a variety of reasons.

I think the crucial thing about being an actor is to be doing it.

I became an actor by doing school plays and youth theaters, and then National Youth Theatre of Great Britain. And then I did study at the London Academy of Music and Dramatic Arts. For me that was a good way to enter the field, to work in the theater.

I'm constantly looking to see whether I look the same as I did earlier, whether I've put on or lost any weight.

I was already devouring literature and I was the ripe old age of 15 when I decided to be an actor. I just thought plays were the most fantastic way of expressing life. I thought I'd discovered Shakespeare - 'hey, there's a new guy in town, don't know if anyone's read him.' I was just excited about the whole thing, from day one.

Certainly what constitutes a stage actor, what constitutes a film actor, I don't even know what that is. And both things are very accurate, in a sense. In terms of people's needs to concentrate on race, I wonder if it's completely necessary, but it's not something that is so dynamically relevant to me that I feel it should be one thing or another.