I play enough other mad people, as well and some sane people, to vary the palette of what's scrabbling around in my head and soul to bring to the floor, as a storyteller.

I was very nervous about doing the Entertainment Weekly cover, because I thought, "Okay, this is the first taste, this is the first visual moment." By then I obviously knew a lot of the more iconic moments in his comic history, but still it's me. It's not a drawing, it's not an artist; it's me and I'm kinda frightened, but it seemed to go down.

Being on set is quite difficult, because it's so big and you've got to try and relax, which isn't easy when you know you're in a massive film. I was terrified for quite a long time.

There's a huge amount of footage of Julian [ Assange] online, but he's usually in presentation or defending mode, talking about his cause, or the revelations which Wikileaks have brought about. There's none of Assange relaxing or in private mode. There's none of the personality I tried to give him behind closed doors [in The Fifth Estate ].

I'm excited to see where the Illuminati and whatever else might happen, how that works, and where it ends up.

What makes a good animated movie is being able to balance adult and knowing in-jokes and also just out and out funny things that make all people laugh. The idea that it's actually something that will appeal to a family, that's the trick.

It still makes me giggle that I'm paid to act.