by Abigail Isaacson in Entertainment

Michelle Trachtenberg, the star of 'Gossip Girl' and 'Buffy the Vampire Slayer,' died Wednesday morning at the age of 39. A friend, photographer Amanda de Cadenet, shared on Instagram that Trachtenberg had been recently hospitalized and that they had a FaceTime conversation from her hospital bed. De Cadenet stated that Trachtenberg was aware that death was a significant possibility. Sources suggest that Trachtenberg underwent a liver transplant within the last year and that her body may have rejected it, leading to her death from natural causes. Trachtenberg's representative confirmed her death, and law enforcement stated that her death is not considered suspicious. Tributes poured in from fellow actors, including Blake Lively, Ed Westwick, Rosie O'Donnell, James Marsters, and Alyson Hannigan. Her boyfriend, Jay Cohen, also released a statement.