I always found the extraordinary loss of life in the First World War very moving. I remember learning about it as a very young child, as an eight- or nine-year-old, asking my teachers what poppies were for. Every year the teachers would suddenly wear these red paper flowers in their lapels, and I would say 'What does that mean?'

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.

It's like playing tennis, you play a different rally with different people. Every actor is different and the chemistry between actors is different.

I'm an eternal realist and the success rate for being an actor is pretty low.

I didn't go to film school. My Grampa always says just watch a lot of movies. He didn't go to film school; he went to theatre school. It's interesting to learn about the technical side of it, but I think it's more important to learn about writing and working with actors.

In Barack Obama, we have a great education president who is rebuilding America. His Race to the Top program is doing more to 'spur us' to improve our public schools than anything we've ever done as a nation.

I believe this system of mass incarceration would have Dr. King turning in his grave. There's no doubt in my mind that Dr. King would be doing everything in his power to build a movement to end mass incarceration in the United States; a movement for education, not incarceration.

I found in Rick Rubin a kindred soul. When I visited his home and looked in his library, I saw he was reading the very same New Age books I had picked up the month before.