Aki makes a quip that a shirt Max offers him belongs "in a Gaspar Noé film". Emily Alyn Lind (Audrey) appeared in Noé's film Enter the Void (2009).
The outfit Kate Keller wears on the first day of school is a replica of Serena Van der Woodsen's outfit in the pilot of the original show
Luke Kirby, (Davis Calloway) has worked with an actor from the original show, Gossip Girl (2007), in the TV show, The Marvelous Mrs. Maisel (2017). The actor in question is, Rachel Brosnahan, who played Girl in the episode, It's a Dad, Dad, Dad, Dad World (2010) of the original. They played Lenny Bruce and Midge Maisel respectively, with their characters being close friends and one-time lovers.
Emily Alyn Lind (Audrey Hope) previously worked on the TV show Revenge (2011), which also stars Connor Paolo, playing Young Amanda Clarke and Declan Porter respectively. Connor appeared in the original, Gossip Girl (2007) playing Eric van der Woodsen.
Tavi Gevinson, who plays English teacher at Constance Billard, Kate Keller, is actually younger than Jordan Alexander, Thomas Doherty and Zión Moreno who play students, Julien Calloway, Max Wolfe and Luna La respectively. They're born in 1996,1993 and the last two in 1995 respectively.