JK Rowling: Alfonso had very good intuition about what would and wouldn't work. He's put things in the film that, without knowing it, foreshadow things that are going to happen in the final two books. So I really got goosebumps when I saw a couple of those things. People are going to look back on the film and think those were put in deliberately as clues.

Emma Watson: Yes, I was in a shop the other day and this woman who was working there comes up and goes, ha-ha-ha, it's so funny, you look exactly like the girl who plays Hermione. And I say, that's because I am.

Michael Seresin: Well, basically, it was very, very soft light so it'll be quite, sort of, very moody. And with no apparent source, because there are no windows. The only thing that there is, because it's such and old and decrepit building, because it's always moving all the time, Stuart made cracks in between the doors, so it's almost as if the blinding light from the snow is coming through and just giving you a very soft light. It's also incredibly dusty, so you have the feeling that there's just dust in the air.

Interviewer: Did you have to use, did you ever have to come up to rats in this? I know your brothers got to.
Oliver Phelps: Only on the Kings Cross station last year, and it's an animatronic one. Until they did the real thing, where it's a real one, and I still thought it was an animatronic one until this thing jumps at me.

Interviewer: Other than the questions I've asked, what are the most ridiculous questions fans have asked you?
Tom Felton: They asked at the second premiere, and I'm sure the third one coming out they'll ask me again. "Which part do I play?" Or do I play the same part. I'm like "No, I've changed. I'll play Harry."

David Thewlis: What you won't see in the film was that they screwed a day-glo, pink and yellow aerial, that looked like a windmill, on top of my head. So the indignity of it is, I'm in the whole werewolf thing and just to finish it off I had this pink little area on top. And I don't think it served any purpose what so ever.

Chris Columbus: And what I loved, there was a line that was cut from the script that I loved, when Harry said to Uncle Vernon, "I'm tired of living by other people's rules." And I thought that was the heart of the film, I thought that, that's exactly what it means to be a teenager.