The nearly five hours of events, including the coronation service at Westminster Abbey and a procession, provided Louis plenty of time to show off his personality once again.
The 5-year-old was seen alternatively yawning and looking around inquisitively as the pomp and circumstance of the service played out before him during the service at Westminster Abbey.
Britain's Prince Louis yawns as he arrives at Westminster Abbey for King Charles' coronation ceremony, in London, May 6, 2023.
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The Royals attend the Coronation of King Charles III and Queen Camilla at Westminster Abbey on May 6, 2023 in London.
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Louis was seated in between his parents and next to Charlotte, who could be seen talking and pointing things out to her brother.
Prince Harry, Duke of Sussex sits behind Prince William, Prince of Wales, Princess Charlotte, Prince Louis and Catherine, Princess of Wales during the coronation ceremony of King Charles III and Queen Camilla in Westminster Abbey, May 6, 2023, in London, England.
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During the procession from Westminster Abbey to Buckingham Palace after the service, Louis got a window seat in his family's carriage, which allowed him to wave and even put his nose up to the window for a closer look.
Prince Louis travels towards Buckingham Palace following Britain's King Charles and Queen Camilla's coronation ceremony in London, May 6, 2023.
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Britain's Prince Louis of Wales, Prince George of Wales and Princess Charlotte of Wales travel back to Buckingham Palace from Westminster Abbey after the coronation of King Charles III and Queen Camilla in London, May 6, 2023.
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Once at Buckingham Palace, Louis stepped out onto the balcony with his family, and the king and queen.
It was there that Louis got the most animated, dancing, pointing to the sky and talking as a military flypast zoomed overhead.
Britain's Catherine, Princess of Wales, Britain's Prince Louis of Wales and Britain's Prince William, Prince of Wales on the Buckingham Palace balcony in central London on May 6, 2023.
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The royals stand on the Buckingham Palace balcony following Britain's King Charles' coronation ceremony in London, May 6, 2023.
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Britain's King Charles, Queen Camilla, Prince William, Catherine, Princess of Wales, and their children Prince George, Princess Charlotte and Prince Louis, Prince Edward, Duke of Edinburgh, Sophie, Duchess of Edinburgh and Anne, Princess Royal stand on the Buckingham Palace balcony following the coronation ceremony in London, May 6, 2023.
Britain's Prince Louis of Cambridge holds his ears as he stands next to Britain's Queen Elizabeth II to watch a special flypast from Buckingham Palace balcony following the Queen's Birthday Parade, the Trooping the Colour, as part of Queen Elizabeth II's platinum jubilee celebrations, in London on June 2, 2022.
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Queen Elizabeth II, Prince Louis, Kate, Duchess of Cambridge, and Princess Charlotte on the balcony of Buckingham Palace, London, June 2, 2022.
Alastair Grant/Pool Photo via AP
Later on, Louis proved equally entertaining while watching the Platinum Jubilee pageant alongside his parents, siblings and other royal family members.
Britain's Prince Louis and Prince Charles attend the Platinum Jubilee Pageant, marking the end of the celebrations for the Platinum Jubilee of Britain's Queen Elizabeth, in London, June 5, 2022.
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Prince Louis of Cambridge watches the Platinum Jubilee Pageant from the Royal Box during the Platinum Jubilee Pageant, June 5, 2022, in London.
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Catherine, Duchess of Cambridge hugs Prince Louis of Cambridge during the Platinum Pageant, June 5, 2022 in London.
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Prior to Saturday's coronation, Kate shared her honest expectation when a well-wisher asked her whether Louis would be on his best behavior for his grandfather's historic day.
"I hope so," Kate said, according to a video shared on social media. "You never quite know with kids."
Editor's note: This was originally published on May 6, 2023.
