While Middleton typically doesn't make a fuss about her birthday, we've made a decision to celebrate by sharing some rare photos of one of our favourite royals!
Kensington Palace announced on Wednesday that the Duchess of Cambridge will be visiting the Royal Opera House next week to meet the costume department and The Royal Ballet dancers.
He arrived in style: William, who worked as an air ambulance pilot for around two years in East Anglia, touched down in one of the London Air Ambulance charity's helicopters. Yes, Kate's into theme parties!
2009: Though 27 isn't exactly a milestone, it was a major birthday for Kate, marking the first in years that William was present for.
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Even though his wife is turning 37, it's also a normal day at work for Prince William.
2010: Kate's 28th was, once again, celebrated at the Middleton home with her family and royal beau. Kate marked the event privately on Wednesday with her family. While her celebration plans now remain a secret, one thing is certain-her husband definitely didn't forget about the big day.
2015: Pregnant (again), Kate spent another quiet birthday at home. In addition to gifting her lovely pieces of jewellery over the years, in 2009 he surprised her with a romantic candle-lit dinner at a remote log cabin on the Queen's Balmoral estate in Scotland.
Happy birthday, Kate! Enjoy your time away from the spotlight, no matter how brief.