Kate Middleton and Prince William are mourning the death of Liz Hatton, the teenage cancer patient who inspired the royals after meeting her in October. Hatton passed away Wednesday at the age of 17 after battling a rare form of cancer.

The royal couple signed the post “W & C” — the initials of their first names, William and Catherine — to signify that the message came directly from them.

Kate Middleton and Prince William on Thursday paid tribute to Liz Hatton after her unfortunate death due to cancer. On November 27th, the mom of the 17-year-old announced on X (formerly known as Twitter) that their daughter had passed away in the early hours of the morning.