Prince Louis was the focus of many people's attentions as he attended the Coronation service.
The five-year-old royal left people delighted as he sat with his parents and sibling - especially when he accidentally sang God Save The Queen at the end of the service.
For many, his actions have been a refreshing reminder that even royal children are immune to the pomp and pageantry surrounding them."
One royal fan tweeted: "Prince Louis sang Queen instead of King bless him #Coronation"
Another wrote: "Prince Louis singing "God Save the Queen" has made my day. He's back!"
A third added: "Prince Louis saying "God save the Queen" during the national anthem is the most iconic moment of this spectacle!"
Earlier on, he was seen yawning and fidgeting during the service for his grandfather the King’s coronation.
The five-year-old royal attended Westminster Abbey with his parents the Prince and Princess of Wales and siblings Prince George and Princess Charlotte.
During the first half of the ceremony, he could be seen letting out a big yawn, while also taking the opportunity to point out something of interest to his sister Charlotte.
He yawned again shortly after the King was crowned, just after midday.
Shortly afterwards, television footage showed he was no longer sitting in the row - but he returned to sing the National Anthem.
Louis was regally dressed in a Hainsworth Garter Blue Doeskin Tunic with specially designed lace work embellishment to the collar, cuffs and fronts, made by bespoke Savile Row tailors Dege and Skinner.
His leg garment was black complete with Garter Blue stripe.
The prince processed through Westminster Abbey and took his seat next to his mother and sister.
The deeply religious and solemn ceremony is two hours long. Louis was not at his great-grandmother Elizabeth II’s funeral in September.
Louis has become known for entertaining royal fans with his reactions during royal celebrations.
He was seen letting out a howl and clapping his hands over his ears on the Buckingham Palace balcony during the Platinum Jubilee flypast as his “Gan Gan” the late Queen told him what was happening.
The now-fourth-in-line to the throne was also spotted being bounced on the knee of his grandfather Charles during the Jubilee pageant and giving his mother Kate a kiss on the cheek and a cuddle.
He stood on his chair, waved his hands in the air, wriggled around and stuck his finger in his ear during the show.
In a personal tweet thanking those who turned out in 2022, William and Kate wrote: “We all had an incredible time, especially Louis… ”
The prince will process out of the abbey with Charlotte and his parents at the end of service and meet with George, who is acting as one of the King’s Pages of Honour.
The Wales family will then travel back to Buckingham Palace in a carriage as part of the grand coronation procession.
