Nope it is lip-synching, they have to given the conditions, but they're lip-synching to a brand new recording they made, so that's exciting.
And sorry WS, no Greg or John. As fun as it is to see them stand around w/ **** faces, it's just Norbert and the ensemble.
"If there was a Mount Rushmore for Broadway scores, "West Side Story" would be front and center. It snaps, it crackles it pops! It surges with a roar, its energy and sheer life undiminished by the years" - NYPost reviewer Elisabeth Vincentelli