The Gossip Girl family is mourning Michelle Trachtenberg. Chace Crawford, who played Nate Archibald on the CW show, posted a tribute to the late actress, who was found dead in her apartment Wednesday morning.

CELEBRITY tributes have poured in for Gossip Girl and Buffy the Vampire Slayer star Michelle Trachtenberg after he tragic death. A number of famous faces have shared their heartbreak over the loss

"Michelle was one of a kind,” Crawford–who played Nate Archibald on the popular CW series– began his Instagram post, which showed the pair taking a selfie. The Boys actor could be seen sporting some scruff and a dark suit, while a black-haired Trachtenberg–who played villain Georgina Sparks– wore a black lace dress.