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.

Because I sleep with him he asked me to audition, you know?

You can actually have a pitch button, you know, to get people on pitch.

I'm convinced that whatever state you're in during your pregnancy has a huge influence on the baby's personality - so I hope we haven't produced a little serial killer!

Mothers are the heart of any household. I try to spend as much time with my children as I possibly can while also fulfilling my professional duties. It is tricky, but I think I manage it.

You learn to rely on a few basic movements and use your voice to the greatest extent possible to convey your emotions. So there was a technical challenge there and a responsibility to create a character from behind the mask.

You just have to do what suits you, and it doesn't matter if you don't look like everybody else. Be you. That's our gift and we've got to celebrate that.