Michelle Trachtenberg, known for her characters in Buffy the Vampire Slayer and Gossip Girl has died at the age of 39, according to the New York Police Department.
Police sources told ABC News that Trachtenberg was found dead on Wednesday in her New York City apartment just after 8 a.m. local time by her mother. The exact cause of death is not yet known, however, no foul play has been suspected.