The photos, taken by Kate Middleton, share something in common with Prince Louis' recent birthday pictures.
The video was shared on Prince William and Kate Middleton's Instagram page.
The Duke and Duchess of Cambridge took all three of their kids "lambing."
The little royals were the cutest sailors at the regatta.
The Duchess of Cambridge was trying out a new color scheme at the King's Cup regatta.
Proud mum Duchess Kate took the pictures at the family's home in Norfolk and at Kensington Palace.
Prince William and Duchess Kate celebrated their son Prince Louis' christening as his big brother and sister looked on.
Prince Harry and Meghan Markle's modern wedding ceremony ushered in a new era for the British royal family.
The Duke and Duchess of Cambridge’s daughter Charlotte Elizabeth Diana is now three years old.
Her royal highness turns 4 years old on May 2.