J.K. Rowling said Bellatrix's role was going to be significant in the last one, when I showed some reluctance in playing a tiny bit part. Up front, they said, 'You're very significant in the last one.' But significant could mean a lot of things. That could just mean a significant plot point. Doesn't necessarily equal big part.

And trust. It takes a long time to trust someone. You work with people, anybody you dont know, it takes about a films length to get to know each other. Then if you move on, you have to start right back at the beginning. But if you carry on together and try doing different things, you can all grow together.

I think everything in life is art. What you do. How you dress. The way you love someone, and how you talk. Your smile and your personality. What you believe in, and all your dreams. The way you drink your tea. How you decorate your home. Or party. Your grocery list. The food you make. How your writing looks. And the way you feel. Life is art.

When you're up for an Oscar, you just get offered everything. It's fantastic, but a lot of it you're completely inappropriate for.

Everyone seems to think I'm very ladylike. That I'm very cultured and intelligent. I drink alot of Diet Coke and belch. I've been known to use the F-word. I've told a few dirty jokes. I arm-wrestle.

Very early on, you figure out that you put your self esteem in the hands of strangers. There's a different commodity. There's the Helena Bonham Carter that everyone thinks they know, who really has nothing to do with me. But you just have to let that go.

I think I've still got a bit of a sado-masochistic streak in me, because if I'm not going to be restricted by corsets and covered in lace, then I still wind up wearing an ape-mask over my face. I do wonder how I get myself in these situations!