I think Harry Potter's very important. Every opportunity I will get for the rest of my life, I would not have got if it wasn't for Harry Potter. And it would be height of ingratitude if I was ever anything but proud to be associated with these films.

What I learned is that acting is to a large extent about trying to stave off self-doubt long enough to be natural and real onstage.

I would say I was challenging the system quite. But I like to think that if the choices I make are slightly unexpected or challenging to people, then that is good. We are definitely three fairly like-minded people in terms of what we value in scripts and in storytelling.

My taste in the films I've taken as an actor is similar to what I'd do a director or writer: all quite odd, challenging stuff, slightly off-the-wall.

When you get as lucky as I got, you have to work as hard as possible to earn that luck.

In my experience of doing physical scenes, half of your energy is spent on trying to get the other actor to enter into it physically with you. Most actors don't want to hurt each other.

If I was left to my own devices, you would see about ten T-shirts in rotation with maybe a few nice pairs of jeans - but I also like to look good. I like feeling really well put together, I just don't have the aptitude and the knowledge to do that.