The iconic Stephen Sondheim, Leonard Bernstein, and Arthur Laurents musical West Side Story is returning to the stage, in a new production at Paper Mill Playhouse. With a cast headed by Broadway vets Matt Doyle as Tony, Belinda Allyn as Maria, and Natalie Cortez as Anita, the production runs June 1-26. At a recent open rehearsal, TheaterMania was on hand to capture footage of three numbers, including the legendary "Dance at the Gym," all of which features Jerome Robbins' original choreography.