CS!: What is Mike Newell like to work as a director? Was he rather paternal to the younger actors?

Robert: Sort of. Everyone says that he's very much of an actors' director and he is quite hands-on. Nothing's kind of theoretical. He'll show you exactly what he wants to do. It's not sort of anything high-flung about it. He won't assume anything to any of the actors. He'll talk to you the same if you're Alan Rickman or if you're an extra. He's a really good director to work with.

CS!: How was it shooting the Tri-Wizard scenes?

Robert: The maze right at the beginning was tough, physically demanding stuff. It's me and Stan and Dan doing it for most of the time, and most of the special effects are kind of real. The whole thing was hydraulic, so the maze is crushing and squeezing in on you, and no one knew if you were going to sort of die, because it closed the whole way. It was all pretty exciting stuff. I had never done anything like that before.

CS!: What are some of the things that each of you face during the maze, which is the third task in the Tri-Wizard contest?

Robert: What we face? It's kind of nothing in a way. It's different to the book how it's been portrayed in this, quite a lot different. It's like your biggest enemy is yourself and the isolation and fear of what's behind the next corner, of not knowing anything. And the maze itself is alive, rather than being monsters and stuff inside. When you're walking around a corner, you never see anything, but all the competitors go insane, because of the competition and the general fear, like being scared of the dark over a period of time.

CS!: Can you talk a bit about the underwater training you went through for the second task?

Robert: I did about three weeks training just before the maze and that was the first thing I did for anything. Yeah, and how long did we shoot underwater? It was two months, I think, but I was only there for three weeks. It's pretty strange, because you can't see anything. Everyone's in blue wetsuits and you get something jammed into your mouth. You have a megaphone Tannoy (that's a speaker for you non-Brits) under the water, which tells you "Look more scared" or something. "Stop breathing." (laughter)

CS!: How is it fighting in a blue screen tank against a non-existent monster?

Clémence: It's pretty scary at first, just because you can't breathe. It's just not natural and you just want to go back to the surface. They keep telling you that you're going to get used to it, and you just stop coming up all the time. You actually spend three hours underwater, which is great by the end of it, because it's really relaxing. It's a very peaceful world.

Robert: And you're not self-conscious at all, because you know that whatever you do, you're going to look like an idiot. (laughter)

CS!: Of all the costumes you each wear in the movie, which is your favorite?

Robert: I think the costume which I have when I'm dead, the funeral costume. And I did request to have an open coffin.

Clémence: And then you attended your own funeral! He came and looked! (laughter)

Robert: I think the torn-up Voldemort blood-stained costume is probably my favorite.

CS!: Have Daniel, Rupert or Emma talked to you about the mad fans you'll be dealing with when the movie comes out or are they trying to keep that from you?

Robert: We kind of briefly met, and I was talking to Dan's dad about his Christmas card to the fans. I think they're printing out 20,000 Christmas cards, just in the first batch, just for his personal fan club. Just the scale of it is incredible. I got fan letters about a week after it was announced that I was cast from people who probably have no idea who I am really. I thought that was really strange.