Samantha Shelton appears in this episode as one of Honor's bridesmaids. She previously appeared on the show as a completely different character--in Season 2's "Presenting Lorelai Gilmore", she played Libby, one of Rory's fellow debutantes.
Nasim Pedrad portrays the waitress Rory rudely interacts with. This is before Pedrad got her big break as being cast as a full-time cast member of Saturday Night Live.
Doyle talks about Paris watching Saw II late at night. Scott Patterson (Luke) would later go on to star in Saw IV, Saw V and Saw VI.
Leslie Odom Jr. portrays Daily Princetonian editor (Princeton University) Quentin Walsh (Pompous Princeton Guy).
Odom Jr., portrayed Aaron Burr in the Broadway hit 'Hamilton', Burr graduated from The College of New Jersey in 1772, which changed its named to Princeton in 1896.
Logan tells Rory he only slept with the other women because he thought they were broken up, to which Rory tells him it isn't true. However back in The Perfect Dress (2006) Rory tells Paris that Logan isn't her boyfriend and that they broke up. This was said in a response to Paris talking about him as her boyfriend showing up to work on the paper. However, if you remember the Thanksgiving episode, that's when Rory found out from Honor that Logan said they were broken up.