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 Harriet the Spy (1996); Inspector Gadget (1999); EuroTrip (2004); Ice Princess (2005); Black Christmas (2006) and 17 Again (2009).
Trachtenberg made her first television appearance at the age of three, in a commercial for Wisk Detergent. She went on to feature in over 100 more commercials. She appeared in her first credited role as Nona F. Mecklenberg in The Adventures of Pete & Pete from 1994 until 1996. During the same period she played Lily Montgomery in All My Children, in which she first worked with future Buffy star Sarah Michelle Gellar.
 Breakthrough career
Trachtenberg's film career began in 1996 with the lead role in Harriet the Spy. She then returned to television for Meego, for which she won a Young Artist Award. She returned to film in 1999 for Inspector Gadget, as the gadget-master's niece, Penny. She also starred in the film Can't Be Heaven. In the summer of 2000, Trachtenberg took up the role of Dawn Summers in Buffy the Vampire Slayer. She remained in the role until the show ended in 2003. She also hosted the Discovery Kids series Truth or Scare from 2001 to 2003. After Buffy and Truth or Scare, she returned to film in the comedy film EuroTrip, co-starring Scott Mechlowicz, Jacob Pitts and Travis Wester, and directed by Jeff Schaffer. She also had a recurring role in the HBO series Six Feet Under as Celeste, a spoiled pop star for whom Keith Charles served as a bodyguard.
In March 2005, Trachtenberg played the title character in Walt Disney Pictures' family comedy–drama Ice Princess with Kim Cattrall (Sex and the City), Joan Cusack (Working Girl) and Hayden Panettiere (Heroes). In the film, Trachtenberg played a science whiz named Casey Carlyle who gives up her future academic life in order to pursue her newfound dream of being a
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Michelle Trachtenberg @ InStyle Summer Soiree in West Hollywood