Kensington Palace shared a more recent photo of William with a caption thanking fans for the birthday wishes.
Sussex Royal, the Instagram account for William's brother, Prince Harry and his wife Meghan, the Duchess of Sussex, commented on the post, saying, \"Happy Birthday to The Duke of Cambridge!\"
The main royal family Instagram account -- which represents William's grandparents Queen Elizabeth II and Prince Philip -- also celebrated with a slideshow of photos of William.
William's birthday celebration comes just one week after he posed with his family on the balcony of Buckingham Palace for Trooping the Colour, the official celebration of Queen Elizabeth's birthday.
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