Blair Cornelia Waldorf is one of the main characters of Gossip Girl, introduced in the original series of novels and also appearing as the lead in the television adaptation. Described as "a girl of extremes" by creator Cecily von Ziegesar, she is a New York City socialite and a comical overachiever who possesses both snobbish and sensitive sides. Due to her position as queen bee of Manhattan's social scene, Blair's actions and relations are under constant scrutiny from the mysterious Gossip Girl, a popular blogger.
Lily van der Woodsen
Lillian Celia "Lily" van der Woodsen is the mother to Serena and Eric van der Woodsen,
as well as being the birth mother of Scott Rosson and the adoptive mother to Chuck Bass.
She is portrayed by Kelly Rutherford.