"You've got to make an effort," Dan Radcliffe says, though he reveals that the bottom of his tie is rammed into the top - "it slipped out during the press conference." He agrees that he presents a very different look to Rupert. "He's more casual - but I like to dress up. I am a suit man - and it makes you feel slightly taller."

Do you reckon the press will keep on treating you well as you get older? The celebrity press can be quite mean.

Dan: There might be a slight difference when I'm 18. But I'll just put a baseball cap on and put my head down. And when you hear about good actors punching the paparazzi - well, that's exactly what they want. Not that I don't smile when I hear a paparazzi has been punched in the face! But they're trying to provoke the actors to get a story to go with the photograph. But I think the press have seen me a bit differently since doing Equus. "Oh, maybe he's actually serious about acting." As if doing five Harry Potter films over a period of seven years was just a joke...

[Talking about Rupert's new ice-cream van] Which ice cream van jingle does it play?

Rupert: It's hard to find one, actually. I can plug it into my MP3 player and play what I want, but it's hard to find a good ice cream jingle.

Do you park then drive off when the local kids come for ice creams?

Rupert: Yeah! You get a lot of disappointed children following you round.

So if you got into your ice cream van one pleasant morning and found a Black Widow perched on the Raspberry Ripple, how would you cope?

Rupert: Oh, that'd ruin the whole thing. That would totally put me off it...