"Gossip Girl" star Blake Lively has paid tribute to her former co-star Michelle Trachtenberg, whose passing was confirmed earlier today. The actress, best known for her role as Georgina Sparks, was discovered unresponsive in her New York City residence and later pronounced dead at 39.

Lively took to Instagram stories to share a heartfelt message, reflecting on their time together on the popular CW drama. Alongside a still from the series, she wrote, "This was the moment I first met Michelle."

Describing Trachtenberg's vibrant personality, Lively added, "She was electricity—when she walked into a room, you felt it instantly. She lived life at full speed, whether she was laughing, standing her ground, or pouring herself into her craft."

"She took immense pride in her work and remained deeply committed to an industry that could often be unforgiving. Her loyalty to friends was unwavering, and she always stood up for the people she loved. She was fearless, passionate, and unapologetically herself," the actress added.

Lively continued her tribute, "Days slip by, and you assume there will always be another chance to reconnect with an old friend," she wrote. "But life has a way of catching you off guard, delivering its most painful blows when you least expect them."

Trachtenberg, who portrayed the scheming Georgina Sparks in "Gossip Girl", was a central figure in 28 episodes of the hit series. 

Fellow cast members, including Ed Westwick (Chuck Bass) and Chace Crawford (Nate Archibald), have since shared their condolences, remembering their time working alongside her.

Beyond "Gossip Girl", Trachtenberg was also celebrated for her roles in other major projects. 

Kim Cattrall, who co-starred with her in "Ice Princess", expressed her grief, as did members of the "Buffy the Vampire Slayer" cast. 

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‘Gossip Girl’ star Michelle Trachtenberg passes away at 39

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