The actor Michelle Trachtenberg, known for her performances in Buffy the Vampire Slayer and Harriet the Spy, has died at the age of 39.
Police sources confirmed her death to both ABC News and the New York Post. There is no cause of death yet known, with police saying on Wednesday that the New York Medical Examiner was investigating the cause, but that no foul play was suspected. Trachtenberg had recently undergone a liver transplant, according to sources.