How did you like the action scenes in "Chamber of Secrets"?
The action scenes for me were so much fun. In the scene when I'm hanging out of the car window, that was actually me, I was hanging 25-30ft up in the air, and it was just really cool. I do as many of the stunts as possible, although obviously there are some I can't do.
Which scenes did you like filming most?
I loved filming the duelling scene, I thought that was really brilliant, because you've got the confrontation between Snape and Gilderoy Lockhart - who are totally different characters. I also loved the scenes were there were loads of people around, I love the crowd scenes.
What were the most challenging scenes for you?
Probably one of the most challenging scenes was the Parseltongue scene, because it was a completely different language [Harry speaks to snakes in their own language] and it was hard to get a hold on at first. I got used to it in the end.
What was it like working with Kenneth Branagh?
It's intimidating when you're first about to meet him, because he's this unbelievable Shakespearean actor. But then you actually meet him and he's one of the nicest guys I've ever met. It's an honour to work with him.
Is it true you've been working out because the owls are so heavy?
Kind of. I have been exercising a lot more, but not just for the owls. I've had to do more physical training for the film to do the climbing and the sword-fighting sequences.
What was it like working with Dobby?
It was kind of hard knowing what kind of facial expression an orange ball is making. There were digital effects on the first film, but none were as animated as Dobby is, so it was quite hard work. But I think most of the credit goes to Chris [Columbus] and everybody who worked on the film, for making it so easy for me.
Did you have nightmares after watching the film?
I was fine with it, I liked it, I liked the fact it was a darker, more edgy film. If you take away the darkness that's in the book, then you haven't done it justice when you've adapted it.
"Harry Potter and the Chamber of Secrets" opens in UK cinemas on Friday 15th November 2002.