After a challenging year, Prince William has shared a moving tribute to his wife, Kate Middleton, on her 43rd birthday describing her as “the most incredible wife and mother,” alongside a new portrait.

Prince William wished his wife a happy birthday today in a touching personal message after an extremely challenging year. The message, posted on Instagram and X, was shared alongside a new photograph of Kate taken by Matt Porteous in Windsor last summer.

Happy birthday, Kate Middleton! Inside the Princess of Wales' plans with Prince William, Prince George, Princess Charlotte and Prince Louis.

Prince William. “To the most incredible wife and mother. The strength you’ve shown over the last year has been remarkable. George, Charlotte, Louis and I are so proud of you. Happy Birthday, Catherine.

Kate Middleton's 43rd birthday portrait was taken by Matt Porteous in Windsor Castle last summer. She is spending the day with Prince George, Princess Charlotte and Prince Louis.

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.

Prince William made rare personal comments about his wife Kate Middleton in honor of her 43rd birthday. See the sweet tribute to the Princess of Wales.

Kate Middleton, who is celebrating her 43rd birthday on Jan. 9, has proven herself to be the shiniest jewel of the British monarchy. The princess is married to Prince William, heir to the throne.

While Kate Middleton has since returned to the spotlight, Prince William was the face of their family in public and his wife's No. 1 champion at home while she underwent chemotherapy.

Prince William is honoring his wife, Princess Catherine, on her 43rd birthday, calling her "the most incredible wife and mother."