Michelle Trachtenberg, best known for her roles in "Gossip Girl," "Buffy the Vampire Slayer," and "Harriet the Spy," has died. She was 39.
Trachtenberg, born on Oct. 11, 1985, began appearing in TV commercials at the age of 3 and even landed a recurring role as Lily Montgomery on the soap drama "All of My Children."
She starred in several children's shows and movies including "Harriet the Spy" and "Inspector Gadget," before landing a breakout role as Dawn in "Buffy the Vampire Slayer," alongside Sarah Michelle Gellar.