I'm definitely a frustrated musician, though it's more in terms of wishing I was a better guitar player and songwriter. But I've never regretted becoming an actor instead. I think it's been a more pure form of self-expression for me. I luckily found something that I could aspire to be good at, whereas I never... I think I'd never quite reach that level of artist that I enjoy in the music world.

Then, at age 20, I discovered theater sort of by accident. Quite quickly, theater became more important to me than music. I began to realize that maybe my talents as a musician were quite limited, or had a ceiling to them, whereas acting seemed to sort of stretch before me. I got very passionate about it very quickly.

[We were very lucky that Sean [ Ellis ] researched the film [Anthropoid ] for many years.] We sort of piggybacked on his knowledge, and he gave us a lot of materials, which we read. For me, the greatest resource was actually shooting the film in Prague.

I really feel actors should try and do as much diverse work as possible to try and keep it interesting.

There's this thing that's come about that wasn't there when I started acting which is they do this thing called a chemistry test. They put a camera in front of two people, it's usually a boy and a girl, and they go, [whispering]. It's impossible. You can't manufacture it or film it, it just has to happen.

It's a very organic kind of way that people are discovering it, by word of mouth, which I always think is the best way for things to grow. In terms of the affect it's been having on me, I don't even notice that. It's lovely to be able to talk about a piece of work that you're very proud of, that I think's a complex piece of work and not superficial and has depth to it.

It seemed to work on camera. And there's very few films - because you make a lot of films and you meet people and you work very intensely and intimately and then you're gone - but there's a few where you actually make friends, and this [The Fall] was one.