From the very start, if there was a spotlight, I would step into it. My parents wondered what to do with this insufferable show-off. They chose acting for me, and I'm very grateful I can still make a living from it.

My parents wanted to be actors. They tried for years but didn't get anywhere. Then Mum got pregnant with me and they decided to make actors out of their children. You need your parents' support if you're going to do it. Otherwise who's going to ferry you to castings?

Acting's incredibly enjoyable, but sometimes it doesn't feel quite enough. I've also written a script about the life of Eleanor of Aquitaine. This will make me sound like a female Kenneth Branagh, but I can't think of anything nicer than directing myself from a script I wrote.

I used to run ten miles every other day and eat very little. I was living in London on my own for the first time and no one was checking on me. I wasn't anorexic but lost three stone. I weighed around seven. It lasted six months until I ran out of willpower.

My father was a tyrant about reading, and that put me off books when I was little.

My uncle worked in emergency wards dealing with people who came in with terrible injuries. He talked about the sketch shows they would put on to lighten the atmosphere. You often find this sense of grim humor in hospitals. The injuries people are suffering are ghastly. You have to laugh at something or you'd otherwise cry.