To realize his impact, go back to 1957's "West Side Story." The film has footage of beautiful performances, including one of Larry Kert, a young performer who finds his confidence while performing "Something's Coming." Though "West Side Story" earned rave reviews, Sondheim was overlooked. To help Sondheim get noticed, Leonard Bernstein — who wrote the music — offered to remove his name from the lyrics and adjust the royalties. "Oh, who cares about royalties?" Sondheim quotes his younger self in the film. "If only someone put a gag in my mouth."