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

Leonardo is the most incredible actor, on the planet, with a couple of people alongside him. Getting to act with him is just [amazing]. I walked away from my audition for that and I couldn't believe that I'd been acting with him. I've worked with amazing people, but my friends freak out that I'm working with him. I freak out in a geeky acting way. They freak out in a starstruck way. He's Leonardo DiCaprio, and his fame is so big. That's a complete tangent about that.

When I went to the Oscars - the only time I've ever been to the Oscars - a few years ago, I wore this Prada dress covered in cooking utensils. I got drunk at the end of the night and started ripping them off and giving them as presents to people, so that was fun. I'm pretty sure that was the point of it, that's how Miuccia meant for it to go I'm sure.

There's always the things that you think are going to be tough. I've been nude once, and I was like, "Oh, that's going to be a nightmare," and actually that was fine.

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 never had posters on my wall and when I meet actors that I really admire, it's exciting because I get to work with them.

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.