The four-year-old has been attending the £14,000 a year Willcocks Nursery School in South Kensington.
The school’s headmaster Simon O’Malley, said he was “delighted” that the Duke and Duchess of Cambridge will be sending their second child to the school.
Here’s a closer look inside the school fit for the Royal family.
Cost per term
Charlotte will join Reception when the new school year starts, with fees of £6,305 per term.
As Princess Charlotte is the second in the family to attend the school, her fees will be almost 4% lower than those of Prince George, according to Admissions.
If the Duke and Duchess of Cambridge decide to send Prince Louis to Thomas's Battersea, too, they will pay £5,790 per term.
There are added charges for extra curricular activities, such as ballet, drama and music lessons.
Thomas’s Battersea, which is rated as outstanding by Ofsted, teaches around 560 boys and girls between the ages of four and 13.
Prince George and Princess Charlotte’s curriculum is compiled of subjects such as art, ballet, drama, ICT, French, Music and PE all taught by specialist teachers.
Princess Charlotte is likely to have a head start in the ballet department, as it’s reported she’s already taking private lessons.
Princess Charlotte’s schedule
According to the school’s website, children will have the opportunity to play and explore as well as to “have a go and persevere; be creative and solve problems; form good relationships; be safe, secure and happy”.
Helen Haslem, Head of Lower School, added: “The emphasis in the Lower School is on enjoyment and this is embedded in our broad curriculum and our most important school rule of 'Be Kind'.”
“Children quickly settle into the routines and expectations of the school where the atmosphere is noticeably happy, yet stimulating in nature. Our foremost aim is to ensure that every child feels safe, happy and confident at school. We help to create an environment in which children are eager to learn and to take an active part in own learning.”
Other famous attendees
Princess Charlotte and Prince George aren’t the only famous faces to attend the exclusive school.
Singer, Florence Welch and models, Cara and Poppy Delevigne both attended.
Maud, the daughter of Lord Freddie Windsor and actress Sophie Winkleman, is currently in the same class as Prince George.