Is there a link between dressing up as a child and going on to act?
I don’t think there’s any difference. It’s just like you used to pretend you were a footballer or a soldier or a cowboy. Particularly with the Harry Potter films, when you’re running around with a knitting needle in your hand pretending it’s well dangerous. It’s a little bit bizarre. Me and Gary Oldman, when we were doing Prisoner of Azkaban, looked at each other and said: ‘What the **** are we doing?’ We were running round with knitting needles as if they were Magnums. It did feel like dressing up as kids then.

How’s work going on the next Harry Potter film?
It’s nearly finished actually.

Is it fun to be part of something that has such a massive international following?
I love doing the Harry Potter films. It’s such a big family, everyone knows each other very well and have worked together for so long on these films. The other good thing is you know it’s going to get seen, that it will be in the cinemas. This isn’t always the case with films you make. You know millions of people are going to see it.

Do you think Harry will be killed off in the last book and film?
I think Dan Radcliffe thinks that but I’m not sure. I can’t imagine J.K. Rowling killing off Harry.