Princess Eugenie is among those mourning Michelle Trachtenberg's death at age 39, and Trachtenberg previously posted about their friendship on social media.

Trachtenberg was good friends with Eugenie, having bonded with her while the royal was living and working ... and added a red heart emoji. Buffy the Vampire Slayer star Trachtenberg shared several ...

Princess Eugenie has paid an emotional tribute to her 'special friend' Michelle Trachtenberg, after the Buffy The Vampire Slayer and Gossip Girl star died at the age of 39 ...

Since Gossip Girl and Buffy the Vampire Slayer actress Michelle Trachtenberg ... well-known faces across Hollywood and beyond. And now Princess Eugenie has posted a touching, personal tribute ...