It’s His Royal Highness’ birthday! Heir to the throne, Prince William is celebrating his 39th birthday today.

Clarence House, the official Instagram page of Prince Charles (William’s father) and Camilla, shared a throwback shot of the two princes to celebrate this special day.

“Wishing The Duke of Cambridge a very Happy Birthday today!” the post read, sharing a sweet post of Prince Charles holding a baby Prince William on his lap, followed by a more recent photo of Prince William, the Duchess of Cornwall and Prince Charles.

Prince William and Kate Middleton’s Instagram account also shared a photo of the 39-year-old father of three. “Thank you for all the birthday wishes and kind messages.”

Happy birthday, Prince William!

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