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Leighton Marissa Meester is an American actress and singer. She is mostly known for her starring role as Blair Waldorf in the teen drama series Gossip Girl from 2007 to 2012.

For Disney, she guest starred as Amanda on the ABC series Once and Again episode "Gardenia". She also guest starred as Nikki Alcott on the ABC sitcom 8 Simple Rules in the episode "The After Party".