Leighton Marissa Claire Meester (born April 9, 1986 in Marco Island, Florida) is an American actress, best known for her role as Blair Waldorf in the book-based TV show Gossip Girl. Her first acting role on a television program was on NBC’s legal drama Law & Order in 1999. Other series in which Meester has appeared in have included CSI: Miami, 8 Simple Rules, 24, 7th Heaven, and House.

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