The actors in the Stars Hollow musical, Sutton Foster and Christian Borle (both Tony award winners), used to be married. This was the first time they've performed together since their divorce.
The picture of the man that is next to Rory's desk at the Stars Hollow Gazette, where she flips the picture frame around in front of Jess because she doesn't want him to look at her "like this," is journalist, David Carr.
The character of Stanley (the one in charge of Richard's tombstone) played by George Anthony Bell also plays Rory's Professor at Yale, Professor Bell, in the original Gilmore Girls series starting in But Not as Cute as Pushkin (2004).
Sophie offers to play her song for the play; however, Taylor tells her that the song isn't catchy enough. The song Sophie tries to sing is "I Feel the Earth Move", an original Carole King song from her 1971 album Tapestry. Also on the same album is the song Where You Lead, which was used (in a re-recorded version by King & her daughter Louise Goffin) for the theme of the show.
Michel tells Lorelai that he has just had a milestone birthday. She guesses 50, and he denies that he is that old. She says that she knows for sure that he is older than 40. For the record, Yanic Truesdale (the actor who plays Michel) was 46 years old when this miniseries was filmed.