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

I see myself doing Harry Potter films as long as I'm enjoying it and as long as they are going to challenge me as an actor. I want to be an actor - it's my aspiration - so I want to do other films. I want to write something and I want to direct something!

To be fair, it's not even the first time I've seen a dead version of myself. There was one on Harry Potter, on the last movie, that they actually used to bring to set in a body bag.

I always saw Michael Gambon wearing madly psychedelic socks, and I always thought that's it is one of the few areas where men can really express colour and have a bit of a dandyish quality to their outfit.

Paul [Dano] was amazing at carrying me around [in Swiss Army Man]. I wanted to be there as much as possible but didn't want to hurt Paul's back, but Paul often chose me over the dummy many times on the set. But yeah, to be honest, a little bit of preparation I did with my friend in my flat could never have prepared me for quite the level of physical reliance we would have on each other.

Dane DeHaan, certainly, is kind of the best friend I've made through acting, in terms of another actor. He's fantastic.

If you're having a bad day, get on with your job, because you having a bad day can affect everyone around you.