I am no saviour. I’m absolutely the last person on the planet who can practically help. I don’t know how to make the different types of therapeutic feeding milk. I’m no chemist. I’m no doctor. I’m no engineer. I can’t manufacture polio vaccines or organise their transportation to the health centres in Saramoussayah or Bissikirima. I can’t build schools, or design drainage systems. I can’t provide the women and children of Mandiana with water.All I can do now is help make people aware of what is happening, of what they are doing. That is all that I can do. For now.

For myself, for a long time... maybe I felt inauthentic or something, I felt like my voice wasn't worth hearing, and I think everyone's voice is worth hearing. So if you've got something to say, say it from the rooftops.

Chris Hemsworth is like Christopher Reeve in that he can do two things: he can wear a big red cape without a shred of self-consciousness. But he's also funny as hell, and he's so sweet. So with all the fish-out-of-water stuff, he's so funny. So he does almost two jobs in a way.

I love the acting community at Cambridge. It's really quite committed and serious, since the days of Derek Jacobi and Ian McKellen right through to Emma Thompson and Hugh Laurie.

When a new project comes along, I want to know that the experience is going to be challenging and exciting. Part of me is going to be drawn to doing something new and also the satisfaction of intellectual curiosity.

Heath Ledger's performance in The Dark Knight quite simply changed the game. He raised the bar not just for actors in superhero films, but young actors everywhere; for me. His performance was dark, anarchic, dizzying, free, and totally, thrillingly, dangerous.

We're all flawed heroes. Responsibility is power. Take responsibility for the consequences of your actions, and the world is yours. Everything is a choice.