Trachtenberg, who gained fame through Nickelodeon's "Harriet the Spy," became a household name for her portrayal of Buffy’s sister, Dawn Summers, before transitioning into adult roles, including that of the cunning Georgina Sparks on "Gossip Girl." Sources revealed she had undergone a liver transplant prior to her untimely demise, though details remain murky.

Her passing has left fans and colleagues in shock, with tributes pouring in from fellow actors. Blake Lively, a co-star on "Gossip Girl," commemorated Trachtenberg on social media, describing her as someone who gave her all in every endeavor, deeply valued her friends, and lived life authentically. Trachtenberg’s legacy continues to resonate through her impactful performances and friendships in the industry.