Leighton Marissa Meester (born April 9, 1986) is an American actress, singer, and model. She is best known for her starring role as the devious socialite Blair Waldorf on Gossip Girl on The CW (2007–2012). She has also appeared in films such as Killer Movie (2008), Country Strong (2010), The Roommate (2011), Monte Carlo (2011), The Oranges (2011) and The Judge (2014). Meester made her Broadway debut in Of Mice and Men (2014). She portrayed Angie D'Amato on the ABC sitcom Single Parents (2018–2020).
In addition to acting, Meester has ventured into music. After a featuring in top ten Billboard Hot 100 single Cobra Starship's "Good Girls Go Bad", she released her solo singles under Universal Republic label "Somebody to Love" in 2009 and "Your Love's a Drug" in 2010. Meester has also recorded songs for various soundtracks. Her debut album, Heartstrings, was independently released in 2014. She has also modeled, having been the face of the Jimmy Choo, Herbal Essences, and Vera Wang brands.