Sarah Michelle Gellar is focusing on her physical and mental well-being while mourning the loss of her former costar Michelle Trachtenberg. "It's true what they say … girlfriends and exercise are good for your mental health,

Michelle Trachtenberg's cause of death remains undetermined, but a source reveals she recently had a liver transplant.

Michelle Trachtenberg ’s final social media posts before her death were throwback photos from her Hollywood past. The actress, known for her work on Gossip Girl and Buffy The Vampire Slayer, was found unconscious in her New York City apartment on Wednesday, February 26, police sources confirmed to Us Weekly. She was 39.

Sarah Michelle Gellar, Taylor Momsen and Blake Lively are among those paying tribute to Michelle Trachtenberg, who died Wednesday.

Michelle Trachtenberg was working on a screenplay based on a book that exposed Mattel before her unexpected death

Michelle Trachtenberg’s producing partner, Casey Tebo, shared his final conversation with the “Gossip Girl” star before her shocking death. Trachtenberg passed away on Feb. 26 at the age of 39, as The Post exclusively revealed.