I had a big crush on her when I first met her, definitely.

I had a big crush on her when I first met her, definitely. But she's more like a sister now, so it would be a bit incestuous. It's too weird.

In England, there's so much history that you feel a part of history even when you're really not,

My dad grew up in Banbridge, Northern Ireland, desperate to get to London. I grew up in London, so I don't know what it's like to yearn for the big city from a small town.

The fourth one was incredibly, much more so, much more physical than the first ones. It's I think simply the nature of the book that its got those 3 massive tasks in it.

The whole series is about the loss of innocence. In the first one ['The Sorcerer's Stone'], everyone's very wide-eyed, almost naïve. Harry's thinking that because he's entering a magical world, it's got to be better than the world he's come from. But it's not — it's just got further extremes. It can have extreme joy, but there are also the depths that man can sink to.