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,

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.

This was Kate Middleton's most difficult year and tomorrow, January 9th, will be her 43rd birthday. Kate usually celebrates her birthdays with Prince William and their kids

Now, let’s be real—43 isn’t exactly one of those milestone birthdays where you throw confetti and pop champagne for days, but it’s still a birthday, and that’s always worth celebrating. The Princess of Wales is famous for keeping things pretty chill on her special day,

Despite being Queen-in-waiting, the Princess of Wales - who is a key cog in the Royal Family machine - refuses to let anything take over from her two priorities: family and health.

Kate Middleton is just days away from ringing in her 43rd birthday on January 9, and after her health struggles over the past year, it’s not surprising that she would want to make this year's festivities all the more special—and relaxing.