Neil Patrick Harris as Robert

Patti LuPone as Joanne

Martha Plimpton as Sarah

Anika Noni Rose as Marta

Jim Walton as Larry

Jon Cryer as David

Craig Bierko as Peter

Katie Finneran as Amy

Christina Hendricks as April

Aaron Lazar as Paul

Jill Paice as Susan

Jennifer Laura Thompson as Jenny

Chryssie Whitehead as Kathy

Stephen Colbert as Harry

Alexa Green as The Vocal Minority

Fred Inkley as The Vocal Minority

Rob Lorey as The Vocal Minority

Jessica Vosk as The Vocal Minority

Callie Carter as Ensemble

Ariana DeBose as Ensemble

Sean Ewing as Ensemble

Ashley Blair Fitzgerald as Ensemble

Lorin Latarro as Ensemble

Lee Wilkins as Ensemble

Paul Gemignani as Himself/Conductor

New York Philharmonic as Orchestra