Michelle Trachtenberg, the actress who rose to fame as a child star with films like “Harriet the Spy” and went on to have memorable roles on TV shows including “Gossip Girl,” has died, according to an NYPD source.

Michelle Trachtenberg—the film and television actor known for roles in Buffy The Vampire Slayer, Gossip Girl, Harriet The Spy, and Ice Princess—had died. Her death was confirmed by ABC News. The outlet reports that she had undergone a liver transplant recently and is believed to have died from natural causes. She was 39.

The Key’s protectors, however, turned the object into a person — Dawn — assuming that someone who is related by blood to the Slayer might have the ultimate protection on earth. Dawn’s arcs were never Buffy at its strongest,