Kate will use videos to speak directly to the public after discovering powerful impact of her messages during cancer treatment

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.

Kate, the Princess of Wales, turns 43 on Thursday, capping what was a tumultuous year for the mother of three and wife of Prince William. Kate, who was born Jan. 9, 1982, is expected to spend her birthday privately with William and their kids -- Princes George and Louis and Princess Charlotte -- at home in Windsor, England.

Prince William penned a touching tribute Thursday to “remarkable” wife Kate Middleton as the royal celebrates her 43rd birthday, four months to the day after announcing she was

The Prince of Wales issued a heartfelt message paying tribute to his ‘incredible wife, the Princess of Wales, on her birthday. Kate is celebrating her 43rd milestone at home in Windsor with her family, after a challenging past 12 months which saw her undergo abdominal surgery, be diagnosed with cancer and face chemotherapy treatment.

After a year that saw her tested to her limits, Kate is a ‘different person’ – determined to do things her way

Since she became the Princess of Wales, Kate Middleton has worn playful pantsuits and a plethora of polka dots.

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

Kate Middleton is 43! The Princess of Wales is celebrating her birthday surrounded by those nearest and dearest to her on Thursday, The Post can reveal. While Princess Catherine has spent much of her time at Sandringham Estate in Norfolk,

Kate Middleton is celebrating her 43rd birthday by putting herself first. Less than one year after revealing her cancer diagnosis, the Princess of Wales is finding the balance between her health and work.