Michelle Trachtenberg is anything but an ordinary 15-year-old. Best known for starring as the title character in the big-screen comedy "Harriet the Spy" opposite Rosie O'Donnell, she stars in the mystery-laden role of Buffy's little sister on "Buffy the Vampire Slayer."
A native New Yorker, Trachtenberg began her acting career at the age of 4, when she appeared in her first television commercial. Since then, she has appeared in over 100 national spots and in starring roles both in film and on television.

In addition to her performance in "Harriet the Spy," Trachtenberg starred opposite Matthew Broderick in the live-action feature film "Inspector Gadget." Her other screen credits include roles in the independent films "Can't Be Heaven," "The Cage" and "Melissa."

Daytime television fans will remember Trachtenberg from her challenging role as the autistic Lily Montgomery on "All My Children," at which time the drama also starred Sarah Michelle Gellar. She was also a series regular on "The Adventures of Pete & Pete" and appeared in the television movies "A Father's Choice" opposite Peter Strauss and Mary McDonnell, and "Christmas in Our Home Town" with Melissa Gilbert.

For the past four years, Trachtenberg has been an active spokesperson for Kmart Kids Race Against Drugs, R.A.D.D, DARE America, The Starlight Foundation and many other organizations and charities. Trachtenberg's contributions to the fight against drugs earned her the prestigious responsibility of representing the youth of America at CNN's headquarters in Atlanta, where she helped President Clinton launch "The Coalition for a Drug Free America" campaign.

In her spare time, Michelle enjoys swimming, rollerblading, ice-skating, bicycling and writing short stories.