Michelle Trachtenberg, known for her roles in "Buffy the Vampire Slayer" and "Harriet the Spy", has died at 39. The circumstances of her death are unclear, but Rosie O'Donnell has commented on Trachtenberg's health before her death. Sarah Michelle Gellar has paid tribute to Trachtenberg on the anniversary of her death, suggesting that some time has passed since Trachtenberg's passing.