Daniel Radcliffe, Sting, Audra McDonald, and dozens more kick off the night with a celebratory lap down the press line.
Kate Beckinsale and Matt Bomer were among the stars who came out to cheer on the show at the Park Avenue Armory.
Will Pomerantz directs this musical about the unsung song of Ethel Rosenberg.
Stage favorites including Jason Robert Brown and Michael McKean were on hand for the afternoon event.
Take a first look at the sideshow-themed poster.
Check out photos from a post-matinee jam session on Broadway.
Check out the stars who will spend their summer at Vassar College.
Drescher was joined by her costars, including Carly Rae Jepsen, to toast the occasion.
Neil Patrick Harris, Sutton Foster, Kelli O'Hara, Ramin Karimloo, and more traveled to the 86th floor to drink in the breathtaking view.
Tony Honors for Excellence in the Theatre were presented at the event.