She also played the lead role in Disney’s 2005 comedy sports drama film Ice Princess as Casey Carlyle, before taking on her signature role as antagonist Georgina Sparks on the CW TV show Gossip Girl, which ran 2007 to 2012, and Trachtenberg returned to the part for appearances in two episodes of Max’s Gossip Girl revival.
The New York Post was the first to report Trachtenberg’s death on Wednesday, noting that the police responded to a 911 call just after 8 a.m. that day at One Columbus Place, a 51-story luxury apartment complex on Central Park South.
Following her role in Harriet the Spy, Trachtenberg continued her career as a child actor, securing another break-out role as Dawn Summers in the hit series Buffy the Vampire Slayer.
In the film, which was one of Trachtenberg's first acting roles, she played a sixth-grader who aspired to be a writer and a spy, while O’Donnell played her character’s nanny.
Her former Gossip Girl co-star Ed Westwick, wrote on Instagram: “So sad to hear of the passing of [Michelle Trachtenberg].
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