While Jenny Humphrey was a key character for the majority of Gossip Girl, actor Taylor Momsen abruptly exited midway through Season 4. Before joining the cast of Gossip Girl as Dan Humphrey’s younger sister, Jenny, Momsen was best recognised for her youth playing appearances in How the Grinch Stole Christmas (2000) and Spy Kids 2 (2002). Momsen’s success with Gossip Girl propelled her into a more mature teen role that differed from her previous efforts, but she would only be in the show’s main cast for the first four seasons.
Jenny was transferred to live in Hudson with her mother at the end of Gossip Girl season 3, so Momsen only made a few appearances in the city until she returned for season 4. Momsen’s final episode as a member of Gossip Girl’s core cast was season 4, episode 10, “Gaslit,” which ended with Jenny returning to Hudson and accepting her banishment by Leighton Meester as Blair Waldorf. Momsen’s departure from Gossip Girl and the Humphrey family in 2010 was unexpected, but she did it for an admirable personal cause.