It's one of two images of the 6-month-old princess released Sunday by Kensington Palace.
The pictures of Charlotte in a Liberty print dress and pink cardigan were taken earlier this month at Anmer Hall, Prince William and Kate's country home in eastern England.
The photos were released to thank well-wishers for all the "warm messages about Princess Charlotte" the family has received.
Princess Charlotte Elizabeth Diana was born May 2 and is fourth in to the British throne after Prince Charles, her father Prince William and her 2-year-old brother, Prince George.
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