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

Princess Eugenie is mourning the death of Michelle Trachtenberg. The youngest child of Prince Andrew and Sarah Ferguson, the Duchess of York, the 34-year-old princess took to her Instagram Story on Thursday to pay tribute to the late “Gossip Girl” star, who she described as a “special friend.”