Christian Borle, who played Marvin in the 2016 revival, appeared with Michael Rupert, who played Marvin in the original Broadway production, in Legally Blonde the Musical. The two appeared as Emmett Forrest and Professor Callahan respectively.
Many of the original lyrics were censored to eliminate major swearwords since the production was recorded to air on live television.
Anthony Rosenthal was 12 during the show's run, which is the same age as his character Jason in Act 2.
Anthony Rosenthal (Jason) became very sick in the days following the performances that were filmed for this special, and almost missed the final show three days later. He defied his doctors' orders and went on anyways even though his vocal performance was not at its usual capacity.
Filmed live during two of the final performances of Falsettos' run on Broadway.