The images were taken by Charlotte's mother, the former Kate Middleton, shortly before she left for her first day of nursery at the Willcocks Nursery School, a private school in west London.
"They thought it would be an ideal first step for Charlotte's education and they were impressed by the team who work there", said a Kensington Palace spokeswoman. Despite her young age, Charlotte is already settling into a lifetime of royal duties.
Kate, who turns 36 on Tuesday, and William will welcome a third child to their family in April. She is fourth in line to the British throne, after grandfather Prince Charles, father William and older brother Prince George.
Richard Pohle The Times PA Wire
On its website the school, rated as "outstanding" by government inspectors, describes itself as traditional, saying it "strives to maintain its ethos for high standards, excellence and good manners".
Daily lessons are themed around topics such as archaeology and the environment.
When it was announced that the princess was going to join the nursery past year, the school wrote: "We are delighted that The Duke and Duchess of Cambridge have chosen the Willcocks Nursery School for Princess Charlotte". "We look forward to welcoming Charlotte to our nursery in January".
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