Some sad news to report in the acting world as ‘Buffy the Vampire Slayer’ and ‘Harriet the Spy’ Actress Michelle Trachtenberg is dead at 39. According to an initial ABC report, citing police sources, Trachtenberg was found dead in a New York City apartment on Wednesday. According to sources cited by the outlet, the beloved Harriet the Spy and Buffy the Vampire Slayer actress had recently undergone a liver transplant procedure.