Michelle Christine Trachtenberg (born October 11, 1985) is an American television and film actress. She is known for her roles as Dawn Summers in the television series Buffy the Vampire Slayer (2000–03) and as Georgina Sparks in Gossip Girl (2008–present), and in the films Inspector Gadget (1999); EuroTrip (2004); Ice Princess (2005); Black Christmas (2006) and 17 Again (2009).
Trachtenberg's career started on Nickelodeon, first as Elsie Soaperstein in the Clarissa Explains It All episode "Babysitting" and then as Nona Mecklenberg on The Adventures of Pete & Pete from 1994 to 1996. She also starred as Harriet Welsch in the first theatrical Nickelodeon Movie, Harriet the Spy, in 1996. She also appeared as a panelist in at least one episode of the game show Figure It Out and as a prankster in an episode of Space Cases. In 1998, she appeared as herself in the Blue's Clues episode "Blue's Birthday".