She might be royal but there was no VIP treatment for the Duchess of Cambridge on her big day, with Kate opting for a very low-key affair.
But not before their family rung in another big milestone!
The selfless mum-of-two made sure her daughter Princess Charlotte was the centre of attention, snapping a series of adorable new portraits to mark her first day of nursery school the day before Kate’s birthday.
And according to Hello! Online, the Duchess spent her birthday out of the spotlight with her nearest and dearest.
“She will be spending the day privately,” Kate’s Deputy Communications Secretary told the website.
Meanwhile the Daily Star Online claims Catherine, who is due to give birth to her third child in April, celebrated with a “small birthday party of eight” at Kensington Palace.
WATCH: Princess Charlotte is all grown up as she starts nursery school! Post continues…
“But she is not drinking any alcohol and she is being careful with her food too,” an insider revealed of the pregnant royal.
It’s believed the VIPs who landed a coveted invite to the intimate bash include Wills and Kate’s good mates Guy Pelly and his wife Elizabeth Wilson.
Kate’s BFF and Princess Charlotte’s godmother Sophie Carter was apparently also there, and it’s believed her sister Pippa Middleton and brother James Matthews popped by.
And perhaps one of the games the group played during the swanky soiree was What’s your unicorn name?
On the eve of Duchess Catherine’s birthday, her family’s successful Party Pieces company took to Facebook to upload a hilarious chart which selects your unicorn name based on your initials and the birth of your month.
So, what is the birthday girl Kate’s nickname? Giddy Twinkle Toes.
Wishing Giddy Twinkle Toes aka the Duchess of Cambridge the happiest of birthdays!