Leighton Marissa Meester (born April 9, 1986) is an American actress and singer. Meester gained fame for playing the role as Blair Waldorf in the CW young-adult television series Gossip Girl. She subsequently ventured into motion pictures and has many successful films to her credit, including Flourish, Remember the Daze, Drive-Thru, and Killer Movie. She most recently appeared in the 2010 country drama film, Country Strong. As of January 2011, she is set to appear in three big screen movies: The Roommate, Monte Carlo and The Oranges.