Brace yourself for a serious cuteness overload.

Today is Lee DoPrince George's sixth birthday, and the royal family has shared three brand new photos of him to mark the occasion.

"The Duke and Duchess of Cambridge are very pleased to share new photographs of Prince George to mark His Royal Highness's sixth birthday," posted the official Kensington Royal account on Instagram.

"This photograph was taken on holiday with the family by The Duchess of Cambridge."

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Prince George is the eldest child of Prince William and Kate Middleton, AKA the Duke and Duchess of Cambridge.

All of the new photos shared were taken by the Duchess of Cambridge -- the first while the family was on holiday, and these next two in the garden of their Kensington Palace home.

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Adorable!

For more Prince George-themed cuteness, please see the time he met Barack and Michelle Obama, and the time he rocked a cool blue rucksack on his first day of school.