I can name 30 or 40 sequences that were some of the most difficult things I've ever had to do. Whether it's going in and out of frozen rivers, or sleeping in animal carcasses, or what I ate on set. (I was) enduring freezing cold and possible hypothermia constantly.

A consensus has emerged in our scientific community that global warming is no longer merely a theory but a reality, a crisis with truly global implications for planet Earth and all of us who share it. - Told to thousands at the New Jersey concert for Live Earth

It was pretty disheartening to be objectified like that. I wanted to stop acting for a little bit. But it changed my life in a lot of ways, but at the same time, I can't say that it didn't give me opportunities. It made me, for the first time, in control of my career. - On Titanic (1997)

I’ve always kind of made sure to maintain the sense of who I am and never be mean or cruel or snotty to anyone. Because, at the end of the day, it's not going to help you last in the business, and who wants to be around someone like that? I don't want to turn into ‘that guy.’ That guy!

On whether there are any aspects of fame he dislikes: You kidding? I feel very fortunate. A lot of people would love to be in my position. There are so many people out there who are suffering trillions of times more than I could ever suffer, and would love to be me. I am a lucky little bastard.

On Martin Scorsese: Martin has brought so much to the art form of film, and he is not the type of person who would be upset by not receiving an Oscar, although it is a practical joke that he has not won an Academy Award after all these years. Whatever opinions critics will have of The Aviator, I really think that this is a great piece of art: once again, he has made a great classic film.