he fifth season of Gossip Girl, an American teen drama based upon the book series by Cecily von Ziegesar and developed for television by Josh Schwartz and Stephanie Savage. The CW officially renewed the series for a fifth season on April 26, 2011.
It was announced later that Taylor Momsen, who played Jenny Humphrey since the pilot, and Jessica Szohr, who joined the series as Vanessa Abrams in season one, would not be returning for the fifth season as regulars. Kaylee DeFer was upgraded to a series regular status in her roles as Serena's cousin, Charlie Rhodes, and aspiring actress/con artist Ivy Dickens. Hugo Becker also reprises his role as Blair's love interest, Prince Louis Grimaldi of Monaco.
With the confirmation of the 2011–12 schedule, The CW television network announced that Gossip Girl would be returning to Mondays at 8:00pm as a lead-in to Hart of Dixie. It features 24 episodes.
The fifth season premiered on September 26, 2011.Overview from themoviedb.org