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.

We'd all like to believe that perhaps people could stop killing each other.

I was grateful to have two weeks to shoot this one scene in Harry Potter. It's a big, big scene, but they have to deliver. And they have high expectations.

I have grown up loving Shakespeare.

Performance is made in the editing room, and I've come to see the truth in that - the idea that they say performances are usually made in the editing room because what you film is the raw material. I think just going through the process of saying, "Which take do we use? Why is that the take we want? I want that take can you edit again, I'm not sure that's the one, I think it's this one." And just because you go through that process, I think somehow it's made me sort of more open about the [actor's] possibilities.

He's really sort of the devil. He's completely emotionally detached. He has no empathy. You find that in psychopaths. It's about power with Voldemort. It's an aphrodisiac for him. Power makes him feel alive.

There is a humanitarian impulse that one aspires to and there are days when one doesn't do it very well.