The Duchess of Cambridge turned 37 yesterday and celebrated her big day without hubby Prince William by her side.
According to The Sun, Kate Middleton had a low-key birthday and spent her day in the company of her three children, Prince Geroge, Prince Charlotte and Prince Louis at Kensington Palace.
The British royal family's official Instagram account wished the Duchess a happy birthday by sharing a stunning portrait of Catherine.
"Thank you everyone for all your lovely messages on The Duchess of Cambridge’s birthday," they said.
Meanwhile, Prince William was at a tea party celebrating 30 years of the London Air Ambulance.
The Duke of Cambridge met with clinicians, paramedics, pilots and crew to talk about the issues they're presented with when dealing with emergencies.
Kensington Palace shared footage of William's day out, writing: "The Duke of Cambridge, #30YearsSavingLives Patron, visited Royal London Hospital to learn more about the challenges @LDNairambface in their life saving work as a first responder in the capital."