Rizzo the Rat appeared throughout the final season of The Muppet Show and along with Scooter as the Happiness Hotel bellhops in The Great Muppet Caper, but this is his first major role with the Muppets and his first appearance with his more-"wiseguy" personality.
The scene where Kermit graduates from college was filmed at Vassar College in New York. Director Frank Oz wanted it shot in front of the most academic looking building on the campus: the dining hall.
Some of the shows advertised in posters on the walls of Mr. Price/Plotsky's offices include "No Problem," "So Hot," "Ahab!," "Two Too Much," "The Golden Touch" and "Unicorns Don't Cry".
The soundtrack to this movie is the only theatrical Muppet movie soundtrack to have never been available on CD. However, three songs from the film ("Together Again," "I'm Gonna Always Love You," and "He'll Make Me Happy") were released on the Muppets music collection "Music, Mayhem and More!".
Both the storybook and comic book adaptations of the film include scenes that weren't in the movie, indicating that they were deleted from the film. Scenes in both of these include a sequence where Statler and Waldorf attempt to cure Kermit's amnesia, a scene where Gonzo told Kermit that the minister at the wedding was a real minister, and an allusion to Beauregard taking The Electric Mayhem to New York. The storybook also has a scene of Dr. Bunson Honeydew performing a bizarre experiment on Animal.
The scene of Miss Piggy singing "Saying Goodbye" with Kermit was filmed at the Lackawanna Rail Terminal in Hoboken, New Jersey. The train Miss Piggy is on is an electric train designed and built by Thomas Edison.
Gregory Hines:
Lends Miss Piggy his roller skates so that she may chase down the purse-snatcher. Also participates in Kermit and Miss Piggy's reunion/confrontation immediately after the chase.