Michelle Christine Trachtenberg (October 11, 1985 – February 26, 2025) was an American actress who achieved widespread recognition as both a child star and a prominent television and film performer. Beginning her career at the age of three in television commercials, she landed her first major credited television role in Nickelodeon's The Adventures of Pete & Pete (1994–1996) and transitioned to the big screen with the title role in the 1996 family comedy Harriet the Spy. Trachtenberg rose to international prominence as a teenager and young adult through iconic television and film projects. She is best known for portraying Dawn Summers in the fantasy drama series Buffy the Vampire Slayer (2000–2003) and playing the memorable villain Georgina Sparks on the CW teen drama series Gossip Girl (2008–2012). Her diverse film credits also include the comedies EuroTrip (2004) and 17 Again (2009), as well as the Disney ice skating film Ice Princess (2005). On February 26, 2025, Trachtenberg was found dead at the age of 39 in her New York City apartment. The New York City Office of Chief Medical Examiner later announced that she died from natural causes resulting from complications of diabetes mellitus.
Inspector Gadget
(Penny)
Teenage Paparazzo
(Self (uncredited))
Mysterious Skin
(Wendy Peterson)
Melissa
(Lena)
Cop Out
(Ava)
EuroTrip
(Jenny)
Black Christmas
(Melissa Kitt)
Ice Princess
(Casey Carlyle)
DC Showcase: Jonah Hex
(Bar Girl (voice))
Against the Current
(Suzanne)
Harriet the Spy
(Harriet)
17 Again
(Maggie O'Donnell)
Dragonlance: Dragons of Autumn Twilight
(Tika (voice))
Beautiful Ohio
(Sandra)
Take Me Home Tonight
(Ashley)
The Circuit
(Kylie Shines)
A Holiday for Love
(Noelle Murphy)
Richie Rich's Christmas Wish
(Gloria)
The Dive from Clausen's Pier
(Carrie Beal)
Sexy Evil Genius
(Miranda Prague)
A Father's Choice
(Kelly McClain)
May All Your Christmases Be Black
(Self)
The Scribbler
(Alice)
Killing Kennedy
(Marina Oswald)
Sister Cities
(Dallas Baxter)
The Christmas Gift
(Megan)
Spyral
(Michelle Cody White (voice))
Can't Be Heaven
(Julie)
DC Showcase Original Shorts Collection
(Bar Girl (segment "Jonah Hex") (voice))
Unicorn Boy
(Violet (voice))
The Hill
(Maggie Rogers)
Buffy's Back: The E! Original Special
(Self)
Buffy the Vampire Slayer
(Dawn Summers)
Six Feet Under
(Celeste)
Law & Order
(Dinah Driscoll (uncredited))
House
(Melinda Bardach)
Best Week Ever
Jimmy Kimmel Live!
(Self)
Punk'd
(Self)
The View
(Self)
Law & Order: Criminal Intent
(Lisa Willow Tyler)
MADtv
(Self)
Late Night with Conan O'Brien
(Self - Guest)
Truth or Scare
(Self - Host)
Meego
(Maggie Parker)
Dave's World
(Angela)
On Air with Ryan Seacrest
(Self)
Blue's Clues
Mercy
(Chloe Payne)
The Wonderful World of Disney
The Super Hero Squad Show
(Valkyrie (voice))
Gossip Girl
(Georgina Sparks)
Weeds
(Emma Karlin)
Meet, Marry, Murder
(Self - Host)
Last Week Tonight with John Oliver
(Voice Over (voice))
Guidance
(Anna)
The Hills
(Self)
Reading Rainbow
(Self - Narrator (voice))
Space Cases
Hollywood Game Night
(Self)
The Rosie O'Donnell Show
(Self - Guest)
Sleepy Hollow
(Abigail Adams)
Human Kind Of
(Judy (voice))
Gossip Girl
(Georgina Sparks)
Watch What Happens Live with Andy Cohen
(Self - Guest)
Criminal Minds
(Diane Turner)
Late Night with Jimmy Fallon
(Self)
Celebrity Wheel of Fortune
(Self - Contestant)
NCIS: Los Angeles
(Lily Lockhart)
Love Bites
(Jodie)
The Adventures of Pete & Pete
(Nona Mecklenberg)
Robot Chicken
(Gummy Bear / Wife / Woman (voice))
Figure It Out
(Self)
Clarissa Explains It All
(Elsie Soaperstein)