Now we live in a time where the public and the private are completely fused and there isn't such a great distinction. We know our private lives are constantly made public. With Facebook and Twitter there isn't such a desire, it feels, to keep things private.

I made a film called "The Theory of Everything," which is based on Jane Hawing, who was married to Stephen Hawking - it's based on her book about their relationship.That's what the film will be about - they were both incredible, strong, willful individuals and I feel like that Stephen Hawking himself would say that he wouldn't have survived without the influence of Jane Hawking, and they were an incredible team together.

I put every ounce of myself into my work, but also it's important that I don't miss every single wedding of my best friends.

My mother was in advertising and worked incredibly hard when she was bringing us up. She was a working mother and a working single parent. That instills in you a sense of determination.

I'm a real geek. I love spending time researching a character and reading about them.

I was a tomboy running around in the garden. I used to play on a local cricket team. I grew up with all boy cousins, for the most part, and my brother. My mother was in the kind of late-sixties, early-seventies origins of female emancipation. And she was very much like, "You're not going to be defined by how you look. It's going to be about who you are and what you do."

But for everyone, I think, there is always a pressure to conform, and I guess as you get older you realize it's less interesting to do that. It starts with you, though, saying, 'I know what I like doing and that's what I'm going to do.