Kate Middleton, who turns 43 on Jan. 9, 2025, shares Prince George, Princess Charlotte and Prince Louis with husband Prince William. See the royals' sweet family photos here.

Kate Middleton, who has expressed her gratitude to the healthcare workers who help cancer patients like herself, is celebrating something else this month. Kate is celebrating her 43rd birthday on January 9,

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 praised his wife in a message shared to social media on her Jan. 9 birthday and posted a previously unseen photo of her by one of their go-to photographers, Matt Porteous. The black and white snap was taken in Windsor last summer and shows Princess Kate smiling as she looked into the distance, hands in the pockets of her jeans.

In the photo, Middleton traded sleek coats and heels for something more casual. She wore a dark blazer jacket rolled and cuffed at the sleeves with a crisp white button down top.

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 praised the 'strength' of his wife, Kate Middleton, in a romantic birthday message posted to Instagram. She turns 43 on Jan. 9.

After a year of health challenges, Kate Middleton celebrated her 43rd birthday as Prince William praised her "remarkable strength" in a social media post. NBC’s Kelly Cobiella reports for TODAY.

The Princess of Wales will celebrate her 43rd birthday in Windsor with her husband Prince William and their children as she prepares to return to work after a quiet 2024