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.

With Kate Middleton's birthday quickly approaching, many royal watchers are likely wondering how the princess intends to celebrate her big day. The truth is, the Princess of Wales has typically kept her Jan.

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.

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

Princess Catherine turns 43 after a challenging year fighting cancer. She took time off for treatment and focused on her health. Plans are in place for her and William to make more public appearances.

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.

Princess Kate is celebrating her 43rd birthday. Her husband, Prince William, honored the "most incredible wife and mother" in a new post.

That, of course, was followed by the shock of her cancer diagnosis, so this will be the perfect opportunity to celebrate." Jennie added that Prince William "isn't exactly known for his overtly public displays of affection or romantic gestures,