Kermit tells Joel Grey to keep practicing his German accent as it might come in handy. This is a reference to the fact that the accent did come in handy as Grey had already won a Tony, a Golden Globe and an Academy Award for playing the German Master of Ceremonies in Cabaret (1972).
Kermit The Frog mentions Joel Grey's daughter, Jennifer Grey while interviewing him. She was 16 years old at the time.
In late February, 2021, this became one of 18 Muppet Shows to get a content warning on Disney+, for "negative depictions and/or mistreatment of people or cultures".
Joel Grey performs "Razzle Dazzle" from Chicago, originally performed by Jerry Orbach. Orbach and Jennifer Grey appeared together in Dirty Dancing as father and daughter.