Gossip Girl is an American teen drama television series created by Josh Schwartz and Stephanie Savage and based on the series of novels of the same name by Cecily von Ziegesar. It follows a group of students in Manhattan's Upper East Side whose private and social lives are chronicled by the unidentified blogger "Gossip Girl". The series was broadcast on The CW from September 19, 2007, to December 17, 2012, spanning six seasons and 121 episodes.

The series' main characters include socialite Serena van der Woodsen (Blake Lively), her popular frenemy Blair Waldorf (Leighton Meester), her mother Lily van der Woodsen (Kelly Rutherford), and her love interest Dan Humphrey (Penn Badgley), an aspiring writer and scholarship student. Other main characters include Serena's ex-boyfriend Nate Archibald (Chace Crawford), his best friend Chuck Bass (Ed Westwick), Dan's sister Jenny Humphrey (Taylor Momsen), Dan's childhood friend Vanessa Abrams (Jessica Szohr), his father Rufus Humphrey (Matthew Settle), and the troublesome Ivy Dickens (Kaylee DeFer).

A ratings hit in its early seasons, Gossip Girl received generally positive reviews from critics and audiences but became known for using negative critical reviews in its marketing. The series won numerous accolades, including 18 Teen Choice Awards. It gained a large cult following, influenced other teen dramas and spawned several international television adaptations. The series was followed by a standalone sequel which aired for two seasons between 2021 and 2023 on HBO Max before being cancelled.