Princess Charlotte began her first day at school with a welcome handshake from staff - including the headteacher.
The four-year-old follows in the footsteps of big brother Prince George, who has been attending Thomas's Battersea - a £19,287-a-year private school - for the past two years.
Charlotte arrived with her family, the Duke and Duchess of Cambridge, and George by car as other parents dropped off their children at the south London school.
Kate missed George's first day at Thomas's Battersea in 2017 as she was suffering from severe morning sickness while pregnant with Prince Louis.
Head of the lower school Helen Haslem was Waiting to greet her new pupil and shook hands with the princess, who will be known as Charlotte Cambridge to staff and schoolmates.
when Charlotte sits down at her new desk and listens to the register for the first time - what will she actually be called?
Her full name is Charlotte Elizabeth Diana, and her official title is Her Royal Highness Princess Charlotte of Cambridge.
It's likely that Charlotte will follow in the footsteps of her older brother and other members of the Royal Family and use her parents' titles as her surname - Cambridge.
She will probably be known as Charlotte Cambridge to her peers, in a similar style to her brother who is believed to be George Cambridge.
However the prince's friends have come up with an adorable nickname for him - PG.
Her dad William and uncle Prince Harry did the same, using Charles's title - Wales - as their surname.
As well as using the name at school they both used it during their military careers.
Thomas's offers a varied and exciting curriculum, including religious studies, computing and ballet.
George is said to be doing very well at school, decided to send Charlotte there too.
A source told Vanity Fair : "He's very popular and has lots of friends, and there's very little fuss made about who he is.
"Either William or Kate do drop off, and they are always very friendly.
"William particularly loves to have a chat with some of the other parents and he works out with some of the mums at the Harbour Club after drop off. He's very chatty and amiable."
