Michelle Trachtenberg, the actor known for “Gossip Girl,” “Buffy the Vampire Slayer” and “Harriet the Spy” died Wednesday. She was 39.

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.

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,