I think it's more important to seek the truth than to try and be perfect, to be honest.

Nothing's been changed overnight. It's like watching your cat grow: you see it every day, so you don't really see it change, you wake up one day and it's a bloody great thing. Your friends come round who you haven't seen for a couple months and they're like, "Oh my god, your cat's grown so much again." And I'm like, "Has it?" But when you're living it... I just find that my life has subtly changed bit by bit, so I don't ever really notice it too much.

Have you seen Cowspiracy? It takes a lot more land to feed a meat eater than to feed a vegan or a vegetarian. It's something I'd love to get into but it's very hard to persuade people to stop things they've been doing for a long time. So maybe it needs to start with the next generation. Everyone needs to raise their children with a bit more responsibility.

More often than not, if you've got a good director and a good script you can't really go wrong.

If you don't practice for three days, everyone will notice." It's something you have to really maintain. So unfortunately, I don't play it that often but I may take it up again. If you don't play for a while, you just can't hit the notes. It's like going to the gym. If you go and do weights, you can lift x amount of weight and if you don't go for ages, you've gotta start again and start from the beginning. So it's a bit like that. It's just a muscle.

The movie is so fun. I've done period pieces before but nothing with this twist. And the movie is just full of such wonderful people, such young actors - people like Matt Smith that I've been friends with for a while.

I would be the last person on earth to complain about what I do - I feel very fortunate and I know there are a million jobs in the world that are much, much harder - but it's not always an easy or glamorous thing to do, that's for sure.