Actress Michelle Trachtenberg has been found dead in New York City at the age of 39. One of her most popular and longest roles, Trachtenberg received acclaim for her role as Dawn Summers on "Buffy the Vampire Slayer" in the early 2000s, alongside Sarah Michelle Gellar. She starred in a number of film and television roles throughout her career including "Harriet the Spy," which was one of her first acting roles, and "Gossip Girl," in which she played Georgina Sparks. See how Trachtenberg responde

Michelle Trachtenberg has died, ET confirms. She was 39. Police say she was found dead in an apartment in New York City, but there's no cause of death details at this time. Michelle was best known to a generation for her child star roles with Nickelodeon, including her big-screen debut in the 1996 childrens book series adaptation, 'Harriet the Spy.' For multiple seasons, she was best known as Sarah Michelle Gellar's younger sister, Dawn Summers, on 'Buffy the Vampire Slayer.' While her career sl