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.

Michelle Trachtenberg’s former costars are paying tribute to her in the wake of her sudden passing. Trachtenberg has died at 39 years old, Deadline reported today. The New York Police Department responded to a 911 call on Wednesday morning,

Since Gossip Girl and Buffy the Vampire Slayer actress Michelle Trachtenberg’s death was announced earlier this week, tributes have poured in from well-known faces across Hollywood and beyond. And now Princess Eugenie has posted a touching, personal tribute, using her social media account to remember the actress who was her good friend.