Michelle Christine Trachtenberg (born October 11, 1985) is an American actress. She is known for portraying Nona F. Mecklenberg in
The Adventures of Pete & Pete (1994–96),
Dawn Summers in
Buffy the Vampire Slayer (2000–03), Celeste in
Six Feet Under (2004), and
Georgina Sparks in
Gossip Girl (2008–12). She has also appeared in films such as
Harriet the Spy (1996),
Inspector Gadget (1999),
EuroTrip (2004),
Ice Princess (2005),
Black Christmas (2006),
17 Again (2009),
Cop Out (2010), and
Killing Kennedy (2013).