I became an actor at a very young age, but I also had a deep respect for nature and I think I was sort of a little biologist when I was younger. I watched documentaries on rainforest pollution and the loss of species and habitats for animals around the world. It affected me in a very hardcore, emotional way when I was younger. So, later in life I wanted to continue that path more and investigate and learn more about ecological issues.

Now is the time to divest and invest to let our world leaders know that we, as individuals and institutions, are taking action to address climate change, and we expect them to do their part this December in Paris at the U.N. climate talks.

It's very hard to impose your beliefs or a specific message about any given movie. I think that audiences always extract what they want from a film even if something isn't overtly political. They may or may not get it, and it's hard to control that.

I know a lot of the intense moments in 'Titanic' were made that much easier and were pushed to even further limits because of that relationship.

Some people don't get it when I'm being sarcastic.

I like to prepare as much as possible beforehand, but there's definitely that element of fear when you're on set, and you have to be conscious of it and use that fear to drive you to work harder.

I've always been spontaneous and outgoing... I've tried lots of things so I've got some good life experiences, which is great 'cause it means I've got lots of material to work with as an actor.