Actress Michelle Trachtenberg, best known for her roles as Georgina Sparks in 'Gossip Girl' and Dawn Summers in 'Buffy the Vampire Slayer,' has sadly died at the age of 39. Her mother discovered her unresponsive in her apartment shortly after they spoke on the phone and notified the authorities.

Emergency personnel confirmed her death at the scene, with no indications of foul play.

While the official cause of death has not yet been disclosed, sources have indicated that Trachtenberg had recently undergone a liver transplant, which may have resulted in complications.

Trachtenberg, who typically kept her health issues private, addressed public speculation regarding her wellness earlier this year, assuring fans that she was healthy and had never had plastic surgery.

Nevertheless, close friends revealed that she had been facing emotional and health challenges.

Neighbors described her as a warm and cheerful presence, with many expressing disbelief at her passing.

Former colleagues, including her 'Gossip Girl' co-stars Blake Lively and Chase Crawford, along with 'Buffy' alumnus James Marsters, shared touching tributes.

Lively paid tribute to Trachtenberg by calling her a 'sensitive and good soul,' while Marsters remembered her as an 'intelligent, hilarious, and incredibly talented' person.

Trachtenberg's untimely death has left fans and peers heartbroken, and tributes continue to emerge from across the entertainment industry.