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Michelle Trachtenberg turns 27 on Oct. 11, 2012. The actress is known for her work as Dawn Summers in the television series 'Buffy the Vampire Slayer' and as Georgina Sparks in the CW hit 'Gossip Girl.'
Pictured: Michelle Trachtenberg appears in a scene from the show 'Gossip Girl.'
( Photo / 17th Street Productions / Alloy Entertainment / CBS Paramount Network Television)