When you're seventeen to early twenties, that's the time you're trying to work out who you are. If you're trying to make some kind of artistic or creative impact, that's the age when you start to figure out how to do that.

It's important to say that the more challenging a scene is, in a way, the more fun it is because the more of my job I get to do.

I could never do stand-up because it's that thing of having to get up on stage. And out of every 10 jokes you tell, nine of them have to get a really good response.

I think I tried to steal a Mars bar once from a shop but then I went and put it back.

It's really good to talk about it [ hydraulic penises and prosthetic butts], and it's very gratifying when people ask us about the other aspects of the film [Swiss Army Man], but [those things] are part of the movie and they're important and hilarious, a very fun part of the movie, so there's no sense from us of not wanting to talk about that. I think it's exciting that those things exist in a film that is also very heartfelt and emotional and profound.

Everyone on the set has a mobile phone, and I found by pushing a few buttons, they could be programmed into different languages. I fixed Robbie's Coltrane to speak in Turkish.

I'm possibly a very morbid person but I think about death a lot.