Upon arriving at the luxury apartment building, officers found a 39-year-old woman unconscious and unresponsive; EMS officials responded to the scene and found the actress dead. Gary Mantoosh,

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.

Michelle Trachtenberg was found in her New York City apartment, and the death is not believed to be suspicious, police said.