"I worked as a doorman all through grad school. I remember taking Leonardo DiCaprio up to his room, and I was in the elevator with him and, like, seven of his friends. It was around the time of 'Titanic'," Cooper said.
"And I remember this guy who looked like a kid, even though we were about the same age, he looked like a little boy. I remember thinking how I was three feet away from this guy, and we were worlds apart," he added. Despite achieving worldwide success thanks to "The Hangover", the actor cannot believe he has so many famous faces on speed dial and is still in awe of his co-star Robert De Niro.
"To this day, I can't believe I'm friends with him. He's infectious. You know when you're with some of your friends and you just start to act like them? That's what he's like. When you're with him, you find yourself just starting to adopt some of those mannerisms through osmosis. I draw the line at going to get a Mohawk, though," Cooper said.