The 1997 film "Titanic" turned the actor into a global star and Leonardo admits he struggled to cope with his newfound fame.

Leonardo, 31, told Britain's Independent newspaper: "As soon as people give you compliments and you suddenly have more power than you've ever had in your entire life, it's not so much you become an arrogant p***k, but you get a false sense of your own importance."

"You're treading on dangerous territory when you begin thinking you've actually altered the course of history."