The weird thing about serious acting is I've always done impressions of people, all my life, and I did the thing called a balloon debate. The idea is there's a hot air balloon traveling across the Atlantic and it's going down and you have to give a speech as to why you should stay in the balloon. Six people are going to be chucked out and you want to stay.

We should just thank each other for our time. For the rest of our lives.

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.

There is so much poverty and desperation in South Sudan, and yet each side is militarily equipped.

Thor and Loki are defined by each other.

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.

For the first 10 minutes after you meet them, they have the wattage and charisma of movie stars. Then you have a coffee with them and you realize we're all the same, we're all just people. All of the actors in The Avengers are so nice. Marvel has these code names for projects and the code name for The Avengers was Group Hug. It felt very much like a group hug on set.