I've basically grown up with Harry Potter, as so many kids my age have. It's kind of a part of my life.

I don't mind doing the whole red carpet thing when I have to when it comes to publicizing a movie. But besides that, I don't like those kinds of things at all. Celebrity status is not really something that appeals to me.

Once you move away from home, it's never quite the same again. You expect everything to be just as you left it, and it never is. It's almost the first step into adulthood, realising you've got to make your own way.

We've done a lot of films now about the IRA, we can move on from all that. I loved '71 because I think it showed a very honest trail and what it was actually like. It wasn't one-sided. I really respect ['71 director] Yann [Demange] for what he did. But we have done a lot of those things.

Vampire teeth really aren't very efficient, are they? It looks very messy. I'm not sure it's the best way to get a pint off anyone.

I grew up my whole life in Ireland and obviously sound very, very Irish. I feel like it's just one of those things that just charms the socks off of people.

I think when you get on with the actors that you're working with, even if you do have really intimate scenes, as long as you get on well, and have a bit of a laugh while doing it, then it's fine.