Sam Worthington

When I was young, my parents were these titanic, infallible figures. But Mum's illness and Dad's battles with diabetes and heart attacks had a ripple effect on me - reminding me of my own mortality and that these illnesses are genetic.

In the movies, they make you look good and tough, but in real life, it's completely the opposite. I do these ueber roles, I think, because in real life I'm quite shy and reserved. In real life, I'm a dork.

If you are prepared to make a fool of yourself for them then you usually get that back. I think that there are points where you become so close to an actor, you know them so well, almost as well or better than their spouse. You have to know them, warts and all.