Kate Middleton References Princess Diana in a Blue Dress and Hat at Trooping the Colour

On Saturday, Kate Middleton attended the 2025 Trooping the Colour in a bright blue ensemble that appeared to be an homage to the late Princess Diana. The Catherine Walker coat dress was constructed with aquamarine fabric bordered by white, with an asymmetrical white lapel, and the matching hat by Juliette Botterilll Millinery was in the same robin’s egg blue. She accessorized with a pair of the late Queen Elizabeth’s pearl drop earrings.

Her daughter, Princess Charlotte, was wearing a pale blue dress, seemingly to match Kate, while Prince Louis and Prince George were in navy blue suits and red ties.

Princess Diana often wore looks by Catherine Walker and was seen in a similar blue and white piece in 1992, as noted by InStyle, while visiting New Delhi, India.

Trooping the Colour is an annual event that also serves as the public birthday celebration of King Charles, though his actual birthday is in November. Last year, Kate was undergoing chemotherapy treatment, and it was unclear if she would be able to attend. Ultimately, she made it after writing on social media that she was having “good days and bad days.”

“On the days I feel well enough, it is a joy to engage with school life, spend personal time on the things that give me energy and positivity, as well as starting to do a little work from home,” she explained. “I’m looking forward to attending the King’s Birthday Parade this weekend with my family and hope to join a few public engagements over the summer, but equally knowing I am not out of the woods yet.”

King Charles has also been undergoing treatment for cancer the past year, making it especially meaningful and important to the Wales family that they attend and celebrate with him, both in 2024 and this June.