Because I'm short and slim, I can identify with somebody who's an unlikely fit for something and desperately wants to be part of it.

The one piece of advice I would give to any actor is, if you want to go out on the street without being recognised, without even being looked at, go out with a 6ft 8in beautiful transsexual. No one gives you a second glance. Especially when you're 5ft 5in.

I have quite a rich inner life, and I'm constantly looking for a way to express that. I haven't found it yet in acting. When you're playing a character, you're only going to find outlets for very specific parts of your inner world.

I was in the bath at the time, and my dad came running in and said, 'Guess who they want to play Harry Potter!?' and I started to cry. It was probably the best moment of my life.

I don't know where my romanticism comes from. My mom and dad would read to me a lot. 'Treasure Island,' 'Robinson Crusoe,' tales of chivalry and knights, things like that. Those are the stories I loved growing up.

I was having a hard time at school, in terms of being crap at everything, with no discernible talent.

I used to joke I was a point-and-click actor. My whole process has been about trusting your instincts and hitting your mark.