We sing a lot of the soundtrack in this film [Swiss Army Man] - me and Paul Dano - and on the last day of filming we had to just get into the back of our sound mixer's van and record a really crappy, rough version of the singing then. For some reason that was one of the most fun days.

I think it's kind of great, to be honest. I'll never do another film [like Swiss Army Man] where I get to talk about those things, so I might as well enjoy it while I can.

I love Steve Carell and Will Ferrell - they're my heroes.

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.

I just got asked by another journalist 'Are you a feminist?' and I was just like... Is there a strange thing at the moment where you have to come out as a feminist? I've been asked if I'm a feminist so many times recently, and I'm just like 'Yes, yes, for God's sake, yes! Is there something that I give off that says I'm not?'

I've always had, like, from the age of about 11, I've had such an intolerance for bad behaviour of actors that I don't think I was ever going to be that person.

I'm the only kid in the world who doesn't want an eighth Harry Potter book.