Mark Ruffalo

I was an introverted kid; I liked my time alone. And the rest of my family is pretty extroverted, so I felt like a bit of an oddball. They're very gregarious and charming and charismatic people. I always felt like I was struggling as a young person. I think everyone was very surprised to hear that I wanted to be an actor.

Of course, everybody makes mistakes, and we've all been young and stupid. But people need to have a sense of respect, particularly in this business, because hundreds of people are ready to take your place at any time. Maybe some people should think about that.