Blair Cornelia Waldorf is the main character in Gossip Girl. She was born on 15 November 1990. She's regarded as the Queen Bee on the Upper East Side.

Blair is considered the most glamorous and beautiful person on the Upper East Side. She is the daughter of a successful fashion designer, Eleanor Waldorf, which contributes to her notable fashion sense. In the novel series, she is described as a striking brunette, and never loses her position as Queen Bee.

Though naturally beautiful, and much-admired, Blair, being an overachiever, enjoys making an effort to catch eyes, often wearing classic, Audrey Hepburn-inspired designer clothes. At times, she also feels challenged by her friend Serena, the similarly admired former Queen Bee.

espite leading a privileged and prominent lifestyle, Blair is generally characterized as a comical overachiever. At times, Blair's ambition can lead her to embrace a haughty and scheming side. Generally speaking, Blair is ruled by her insecurities, despite a confident exterior, usually caused by her feeling inferior to Serena. While she's regarded as being extremely knowledgeable, Blair seldom leaves success to chance, or to her own talents, and usually works to sabotage her competition. Typically, Blair finds rivals in most females, including (and sometimes especially) Serena, her best friend. A result of this insecurity, Blair does not trust easily.

Blair Waldorf is the daughter of Harold Waldorf , a rich lawyer and Eleanor Waldorf , a wealthy heiress from an Upper East Side family and also a famous designer. Blair's father was caught cheating on Eleanor with another man named Giles, which caused Eleanor to divorce him.