Alan Rickman, who was mentored me a lot. He was very keen to offer his opinions on stuff. Not in a pretentious way. Not in a patronizing way.

I had a screen test and an audition for the role of Neville Longbottom. It wasn't a job at that point. It was just something I enjoyed doing. And it's hard to remember back then, really, that much. But I just remember loving it.

I'm very much open to the possibilities.

I did enjoy theater. I actually do prefer making films and television, but it was a learning experience for me, because I got into television at 5 and film at 11, and theater was something I completely bypassed.

At that age, filming Harry Potter, I never contemplated. I just went in there and did my acting. I never thought, "What's the character actually feeling here? What's he trying to get across?" And never looked at it from that classically trained actor's point of view. And so when Jason Isaacs started throwing up these ideas, I thought, "Whoa. What an interesting way to look at acting." Which is why, again, I would do theater.

What I've found is that stage is very much a foundation of acting. It's where it all began and you're working with that repetition.

I was a short, chubby kid, pretty shy.