Michelle Trachtenberg was found in her New York City apartment, and the death is not believed to be suspicious, police said.
Trachtenberg began her career as child actor, notably starring in the big screen adaptation of "Harriet the Spy" in 1996.
Michelle Trachtenberg, who is known for her roles in "Buffy the Vampire Slayer" and "Gossip Girl," has died at age 39.
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