I wanted to be a musical theatre actress - I wanted to play Sally Bowles, forever and ever always.

People get married when they're 18 and spend their whole lives together. I think their greatest fear is that someone will see it as a fling because they were young and it didn't mean anything.

I grew up with an older brother, so I'm pretty good at being bashed around.

I've always been quite careful about what I wanted to do. I've just never wanted to revisit old ground or do something that's easy. I want to do something that I would look at and go, "I don't know what to do!" The most exciting thing is when you're a bit scared, so I'm looking to find something that's really terrifying.

I was quite straight-laced. I was quite academic until I was about 14 and then I went to boarding school where I had the opportunity to continue to be very academic, but got less interested in it and became more involved in acting. And then when I was applying for universities I used a couple of places on my UCAS form to apply for drama school without telling anyone... but didn't get into drama school. But that was the most rebellious thing I did.

I did Wall Street, and then everything that happened with An Education took me up until March. I didn't want to work during that because there was just so much stuff. I didn't realize you had to go to so many parties. It was a nightmare! I had to go to all these parties! The glamour!

When you start playing a character every day for seven weeks, it suddenly starts becoming easier.