A NYPD spokesperson said Trachtenberg died at her apartment this morning.
After responding to a 911 call at her building, police found her unconscious and unresponsive.
Trachtenberg was pronounced dead after emergency medical services arrived.
Michelle Trachtenberg in 2009Matt Carr/Getty Images
A cause of death was not immediately available, but authorities do not believe her death was suspicious.
An investigation remains ongoing.
My passion for the role won the producers hearts, Trachtenberg said.
But it wasnt until the early 2000s that her acting work picked up again.
Along withBuffy the Vampire Slayer, she hosted the Discovery Kids showTruth or Scare.
Its kind of easy to be evil when youre saying evil things.
Its definitely a lot more fun than playing the good girl.
I love the reaction you get.
I never understood why some actors dont want to play villains or evil.
(Whedon would later deny the various claims against him.)
