Former Buffy the Vampire Slayer star Michelle Trachtenberg, who joined the main cast in the fifth season as Dawn, Buffy’s younger sister/mystical key, died yesterday in her New York City home at the age of 39. She was believed to have recently undergone a liver transplant and her death was attributed to natural causes, pending an autopsy.
Trachtenberg earned early fame in the mid-90s, appearing on The Adventures of Pete & Pete on Nickelodeon and All My Children on ABC. In 1996, at the age of 10, she nabbed the title role in the film Harriet the Spy. She joined the cast of Buffy in 2000 and remained on the show until its conclusion in 2003. In 2004, she appeared as one of the leads in the teen comedy EuroTrip.
Despite being the youngest main cast member by far, Trachtenberg is the first actor from the cult classic series to prematurely shuttle off this mortal coil. Earlier this month, a sequel series was announced at Hulu, with Sarah Michelle Gellar reprising her role as Buffy on a recurring basis. There was no word if any other cast members, including Trachtenberg, would be involved.


