"If I wasn't here, I'd be in bed probably now. I know it's coming up to two o'clock in the afternoon, but that wouldn't matter to me!

"I've never felt this tired before, normally I have a lot of energy. I still do have a lot of energy, as you can probably tell, but for some reason, just before the end of a film, your body starts to let itself wind down.

"Diet Coke is a big help, although I did hear something rather disturbing about it recently," he adds, heading off on a tangent.

"No, it was about full fat Coke - apparently highway patrolmen in certain states of America carry two litre bottles of Coke around with them to wash blood off the roads... but hell, it tastes good, so never mind!"

"What's great about Harry is he doesn't take no for an answer, he doesn't accept what people are saying, he always questions things and tries to go beyond what people are telling him and in the end that is both the downfall and the salvation of his character," he says.

"I think curiosity is a lovely quality to have and just a lust for knowledge's sake. Also, what I think all kids have learnt from him is just the value of friendship and how important friends can be to life."

"There's things on film sets which no one tells you, like for Christ's sake don't stick your tongue in! Luckily, I have never made that mistake, but no one tells you and you're too embarrassed to ask. Generally speaking, unless your co-star does, DON'T! It didn't stop me from trying though..."

"She was at the fifth film premiere and kissed me on the cheek. I turned round to her and said, 'Thank you, because you've given me closure on my adolescent years'. I also got a note from her congratulating me on how I'd presented an award at the Baftas and I think we know that means she wants to marry me!"

What would Jamie Cullum say? "He'd accept it, he'd have to live with that!"