Michelle Trachtenberg’s family has objected to an autopsy, leaving the actor’s cause of death undetermined. The family cited religious reasons, the New York City Office of the Chief Medical Examiner told ABC News.

Michelle Trachtenberg's cause of death was revealed Thursday after the 39-year-old actress was found dead in New York City Wednesday morning.

Eugenie became friends with Trachtenberg when she lived in New York City and worked for the art auction start-up Paddle8 from 2013 to 2015. Their friendship first became public in December 2013, when they were photographed courtside at a Knicks game alongside actor Michael K.