A glittering array of stars were in attendance for the screening of the new documentary Six by Sondheim, which offers a candid look at the creative process and life of you-know-who by exploring six of his iconic songs. The film, which will debut on HBO on December 9, was directed by longtime Sondheim collaborator James Lapine and produced by former New York Times chief theater critic (and now award-winning producer) Frank Rich. The screening at the Museum of Modern Art and swanky after-party at the Four Seasons on November 18 attracted such celebs as Glenn Close, Darren Criss, America Ferrera, Jeremy Jordan, Laura Osnes, Tony Bennett, Nathan Lane and way too many more to list here. Flip through the gallery below and check out the movie next month on HBO.