Kate wowed in a stunning red and white printed dress by Michael Kors, known as the 'Carnation dress'.
The dress may be familiar to royal fans - she rocked it during Meghan and Harry's rehearsal dinner.
This time, she cinched in her waist with a black belt and a pair of high heels.
We could write an essay on her perfect Chelsea blow out.
The daughter of Duchess Catherine and Prince William was all smiles on her first day of school.
British reporter Rebecca English shared, "She’s very excited, I’m told - as is George at the chance to show her around the school where he has been a pupil for the last two years."