Home Michelle Trachtenberg during World Premiere of “Good Burger” at Paramount Theatre in Hollywood, California, United States. (Photo by Ron Galella/Ron Galella Collection via Getty Images) Michelle Trachtenberg during World Premiere of "Good Burger" at Paramount Theatre in Hollywood, California, United States. (Photo by Ron Galella/Ron Galella Collection via Getty Images)

Michelle Trachtenberg during World Premiere of “Good Burger” at Paramount Theatre in Hollywood, California, United States. (Photo by Ron Galella/Ron Galella Collection via Getty Images)

New York City, NY – Michelle Trachtenberg, known for her roles in “Gossip Girl” and “Buffy the Vampire Slayer,” has died at age 39. Credit: MediaPunch / BACKGRID

Michelle Trachtenberg