What are your fondest memories of filming the Harry Potter movies?
It's always about things not to do with the films, I think. It's to do with off set. Or being in a bar late at night with Richard Harris [who played Professor Dumbledore in the first two films], bless him, before he died, and hearing stuff about his life and then realizing that, if I don't go to bed, I'll have an hour's sleep before call in the morning.
Do you have any souvenirs from the set?
Everybody's fascinated by that. I have. I am now not going to tell you what they are.
Give a hint.
Certainly not. Because I'll be releasing that information gradually.