Snow Cake is a lovely film. Really proud of that. We shot it in 21 days. I thought Sigourney was amazing in it. And very, very accurate. I think there was some element that thought she had pushed it too far. But not at all when you do the amount of homework she had done and spent the amount of time she did with adult autistics. She was right on the money. And I think Marc Evans is a terrific director. He's a sweet, open, honest man and a really good director of actors.

Give me a window and I'll stare out it.

I knew with Snape I was working as a double agent, as it turns out, and a very good one at that.

If you judge the character, you cant play it.

The directors you trust the most are the ones, when you ask them a question, they've got the guts to say, 'I don't know.'

I have every sympathy for writers. It's a mystery to me what they do. I can edit. I can cross out and say, 'I'm not saying that' or, 'How about we move this to here? Wouldn't that make that bit of the story better?' But where any of it comes from is beyond me. I will never write a play or a novel.

I like it when stories are left open.