Princess Kate last attended a garden party in May 2023, days after the king’s coronation. The princess has been making her way back into public life since announcing that she was in remission.

In the new book Dianaworld: An Obsession, author Edward White chronicles Princess Diana's life through the lens of celebrity and the viewpoints of people around her. When it comes to Diana's daughter-in-law, Kate Middleton, the author says her royal career is marked by one major difference—and that Princess Kate has learned from Diana's mistakes.

As part of her Buckingham Palace garden party ensemble on May 20, Kate Middleton had an unexpected nod to Prince Harry and Meghan Markle, though it's anyone's guess as to whether it was intentional or not.