I loved doing Harry Potter. I had a great time on that. And I think it's good to have a mix. I think you're learning all the time.

Kenya doesn't have much of an infrastructure for hosting a film of this scale. Our producer decided that for the film to really work it had to be in Kenya.

Within the process of filming, unexpected situations occur.

It's not great if someone gives you sort of bland praise without giving you clear direction and say, "This is good, let's try it like this." I have worked with someone who seemed quite inarticulate and just would say, "That's good, that's good." That's very frustrating because - it's nice to know something is good but you know it can always change.

I like to keep fit, but I never lift very heavy weights...

I feel there's so much still to learn about acting. But there is some magic in the capturing of performance and in the process of editing a performance. The psychology of human beings and what's coming through the face... that fascinates me.

I spent the past week here in India getting a sense of the reality of HIV and AIDS in people's lives. Fathers and mothers are dying, leaving children with no support. Stigma and discrimination is ruining the family lives. There is an urgent need for education, information, and increased awareness of HIV and AIDS. The response needs to be now. We cannot afford to become fatigued.