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.

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.

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 and "looking after herself" after completing chemotherapy treatment, a family friend tells PEOPLE.

Kate Middleton may have retrieved from the spotlight within the past year, but that doesn’t mean her impact hasn’t been felt by the royals. The Princess of Wales, who is celebrating her 43rd birthday Thursday,

The Prince of Wales shared a new picture and described his wife as 'remarkable' in a touching birthday tribute on Instagram.

The Prince of Wales posted a birthday message for his wife, Catherine, Princess of Wales to social media on Thursday to celebrate her 43rd birthday.

Princess Kate celebrates her 43rd birthday on Thursday, and the mum-of-three is feeling very positive about the year ahead as she continues her recovery from cancer

Prince William praised the strength of the Princess of Wales after a turbulent year, offering a 43rd birthday wish on social media that described her as an incredible wife and mother