The Prince of Wales wrote that he and the couple’s three kids — Prince George, Princess Charlotte and Prince Louis — “are so proud” of Middleton.

Happy birthday Princess Kate! And happy new-royal-portrait-day to the rest of us. In honor of Kate Middleton ’ s 43rd birthday on January 9, Prince William shared a new black-and-white portrait of the Princess of Wales on the couple’s official Instagram, with a sweet message in the caption.

Kate Middleton is celebrating her 43rd birthday on Jan. 9 and it feels like a big one. While it isn’t a milestone year, it is a milestone day for her after her battle with cancer in 2024. Prince William decided to honor his wife on Instagram with a surprisingly mushy post — and we love it!