Leighton Meester is an American actress and singer, best known for her role as Blair Waldorf on the popular television series Gossip Girl. Born on April 9, 1986, in Fort Worth, Texas, she began her career in the entertainment industry at a young age, appearing in various television shows and films. In addition to acting, Meester has pursued a music career, releasing several singles and an album. She has also appeared in movies such as Country Strong and The Roommate. Meester continues to be active in both film and television, showcasing her diverse talents.