Charles Bartholomew Bass is a fictional character in the novel and television series Gossip Girl. In the TV series, he is portrayed by British actor Ed Westwick. Although he is a secondary antagonist in the original book series, the TV series elevates him to an antiheroic main character, and the male lead of the show, where he is noted for his financial ambition, hedonism and personal style.

Gossip Girl is an American young adult novel series written by Cecily von Ziegesar and published by Little, Brown and Company, a subsidiary of the Hachette Group. The series revolves around the lives and romances of the privileged socialite teenagers at the Constance Billard School for Girls, an elite private school in New York City's Upper East Side. The books primarily focus on best friends Blair Waldorf and Serena van der Woodsen, whose experiences are among those chronicled by the eponymous gossip blogger. The novel series is based on the author's experiences at Nightingale-Bamford School and on what she heard from friends.