Michelle Trachtenberg's death at 39, which definitely took the public by surprise. Celebrity tributes to Trachtenberg have been rolling in, and her Gossip Girl stars like Blake Lively and Chace Crawford (among others) have shared their love for her on social media.

Michelle Trachtenberg's former co-stars from “Gossip Girl” and "Buffy the Vampire Slayer" paid tribute to the actress following her untimely passing on Wednesday.

Chace Crawford has honoured co-star Michelle Trachtenberg following her sudden death at age 39. The actor described his former Gossip Girl co-star as "a force of nature" in the wake of her passing. Trachtenberg was found dead in her New York City apartment on Wednesday morning.