Leighton Marissa Meester is an American actress and singer. She is known for her starring role as Blair Waldorf on Gossip Girl, which ran from 2007 to 2012. She has also appeared in films such as Killer Movie (2008), Country Strong (2010), The Roommate (2011. She portrayed Angie D’Amato on the ABC sitcom Single Parents (2018–2020). Meester made her Broadway debut in Of Mice and Men (2014).