The popular image that Hollywood is ruined by difficult prima donna actors is nonsense. They're certainly very nice to directors. I can't say the same about producers, who I found difficult, paranoid, and certifiably insane, mostly.

I think your 20s are the hardest part of life. I mean, everyone goes on about how hard it is to be a teenager, but actually I think it’s tougher to be in your 20s because you’re expected to be a grownup and expected to earn your own living and be successful and I think you feel like a kid still.

I can only do it if there's humour, wit, comedy and drama. If you can get audiences laughing and then suddenly turn them to tears... it's a weird way of making a living making people cry, but I think it's very exciting to be able to send audiences on a rollercoaster ride.

In the States everyone aspires to be middle class. It's so engrained into the American psyche: As long as you work hard you're going to be rich some day. The history of Britain is that if you're born working class, you're going to stay there, although that is changing.

It seems to me that romantic comedies used to be about falling in love, but in recent years they've really become just comedies where the love story is only there as a spine to hang the jokes on.

I think the first rule of comedy is that it has to be funny and I find a lot of the broad comedy which is sent to me, painfully unfunny.

I can't find anything wrong with Ashton Kutcher. I think he's great. It's odd that in America there's a very mixed reaction to him. I think those that have only seen him on 'Punk'd' or 'That 70s Show' get him wrong. There's much more to him than those characters or that persona he plays in those shows.