I think we all mistake certain things for happiness. I think we mistake comfort for happiness and we mistake pleasure for happiness, and entertainment for happiness, when really these are just things we use as proxies for our happiness. We use them to cheer us up or try and achieve brief happiness, when really happiness is something much more profound and long lasting and exists within us.

I'm simply saying that our deepest thoughts, desires and preoccupations manifest themselves in art, whether we intend them to or not. That's what art is for; it's not cerebral, it's emotional.

Chris Martin's a good friend of mine. I'm actually Apple's godfather. He's an old friend and we've been mates for quite a few years now.

Nira Park, who is my longtime producer and friend - I've know her since we did Spaced, the TV show - she gave me this script the last day of filming The World's End. She said, "Take a look at this. It's filming in London next year, and you might like to look at Jack." I trust Nira implicitly.

The thought of filming in London was a big draw because I could stay in my house. I read it, and I was really taken with it because it felt at once very unapologetic for what it was, which is a romantic comedy. But at the same time, a little spiky and a little truthful.

The nuts and bolts of shooting a film and writing a film are still really difficult. But what makes it easier is the fact that you know you're going to go to work with your best mate.

My worst job was packing animal feed in a warehouse in Gloucestershire when I was a student. It was a very strange environment. It was hung heavy with oat dust, the place was infested with mice, and everyone who worked there was over 60, and I was 18. It was crazy. Apologies to anyone who works in animal-feed packing industry and loves it.