I'm sure acting is a deeply neurotic thing to do.

We're in a world of truncated sentences, soundbites and Twitter... [Language] is being eroded -- it's changing. Our expressiveness and our ease with some words is being diluted so that the sentence with more than one clause is a problem for us, and the word of more than two syllables is a problem for us.

The actor shouldn't edit themselves or be anxious. And the actors that I admire are always the ones who are inventive and their imaginative life in free-willing. It's a director's job to go, "No here, don't do that, go there."

I have a great editor and I enjoy, in a masochistic way, being ruthless about my own performance. How do I know, but I think I'm quite good at saying, "That's no good. That's no good. That's it. That's it. That's good." And I'm with the editor who goes, "No, I think you're wrong. That's not your best." There's an initial point in the editing, if you're directing yourself, especially in my case, where you go, "Ouch, ouch, ouch, I can't watch this." And then, there's a point where you become hard-nosed and just take your neurosis away and go, "What's working? That's okay. That's okay. We can lose that, and lose that." You get objective about it.

So much of movie acting is in the lighting. And in loving your characters. I try to know them, and with that intimacy comes love. And now, I love Voldemort.

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.

Most films are rooted in a book or a comic strip, but I don't go out there saying I want to do adaptations.