Cecily von Ziegesar is an American author best known for her young adult series, Gossip Girl. The series, which began in 2002, follows the lives of privileged teenagers in New York City as they navigate relationships, social status, and personal challenges. The books are characterized by their engaging writing style and exploration of contemporary teen issues. In addition to Gossip Girl, von Ziegesar has written other series, including The It Girl and Alphas. Her works often focus on themes of friendship, love, and the complexities of adolescence, appealing to a wide audience of young readers and fans of teen drama.