It is better for me to serve a charity as an actor or a voice, rather than at a luncheon being just a celebrity.

But comedy I'd love to do as much as humanly possible.

I'm so dependent on reacting to the other actors on the set, and to the director. I'm very responsive. I react. And I treasure the energy that reaction gives.

I don't do anything that would ever come across as advice or suggestion, but it's just part of a debate. Like, "I would like to try this," or "Let me do another one with more stillness, let me emphasize that." Rather than "I think you should emphasize this, I think" - you know, I don't impose choices.

That hunger of the flesh, that longing for ease, that terror of incarceration, that insistence on tribal honour being obeyed: all of that exists, and it exists everywhere.

I hope I'm able to achieve more on camera through stillness, through focus, through being quite careful to do less on every take, rather than more. So I'm reducing, rather than adding. Which hopefully is a good exercise. That's what I'd like to do.

Working in film, if you work with great directors, you learn that after every take you must let go. Sitting with my wife at the Academy Awards, we both let the moment just go.