Leonardo DiCaprio's first major film role was in "This Boy's Life" (1993), starring Ellen Barkin and Robert De Niro.
"I'd never seen a set that serious before," DiCaprio told CBS "Sunday Morning"'s Lee Cowan. "I'd come from, you know, television shows and commercials. But once De Niro walked onto set, everyone was silent. And I was like, 'What the hell's goin' on?' It was like a ghost came into the room! But I realized the concentration that he put into this.
"Michael Caton-Jones, who was the director, laid some foundation for me: basically, 'Shut up, kid, when we're trying to be serious!'" DiCaprio laughed. "And, you know, 'Don't complain. Pain is temporary. Film is forever. Concentrate on the work. Prepare.' [That] really gave me the fundamentals of what it was to do a film like that."