To the children who loved Harry Potter, I want to say your enthusiasm was the real magic. I so enjoyed being on the journey with you. And to the adults who bought the Harry Potter books and devoured them, I just want to say, those books were for children.

Every day the Daniels [Kwan and Scheinert] would come up with some amazing solution and [make it easy] to put yourself in their hands. There's something really lovely about knowing you're working with directors who know exactly what they want and exactly what they're looking for, and they're not going to move on until they have it. That, as an actor, frees you up a lot because you can [try different approaches] and they'll only use what's appropriate.

With any kind of artistic thing, it's a muscle, like any athlete, and the moment you're not doing it, you lose all confidence. That's why I'm terrible with down time.

Some people think I am gay, which I think is awesome.

For me, you go to university to meet lots of different people from different backgrounds. I think that's one of the most important things you get there. And you also get some sense of direction regarding what you want to do when you leave. I sort of know what I want to do in my life - I want to act and ultimately I'd like to write. And in terms of meeting people from different backgrounds, that's what you get on a film set. So the two most valuable things that university would have given me I've sort of achieved by being on a film set.

I always saw Michael Gambon wearing madly psychedelic socks, and I always thought that's it is one of the few areas where men can really express colour and have a bit of a dandyish quality to their outfit.

If I can make a career for myself after Harry Potter, and it goes well, and is varied and with longevity, then that puts to bed the 'child actors argument'.