The Princess of Wales revealed the adorable moniker during a coronation event.
The 5-year-old prince let out a big yawn and pointed out interesting things while seated in Westminster Abbey.
The young royal was absolutely adorable in a set of countryside photos.
Sunday marked the first time the 4-year-old prince accompanied his family to Easter church services.
The Duke and Duchess of Cambridge are making significant life changes this year.
"As a parent of a four year old not in line to the throne. Prince Louis we see you and we understand you."
The 4-year-old royal was the accidental star of the queen's Platinum Jubilee.
The 4-year-old royal is the gift that keeps on giving.
Watch Queen Elizabeth II’s Platinum Jubilee kick off with pomp and circumstance to mark her historic milestone on the British throne.