Kate Middleton's eight word scolding to the young royals has caught the attention of a lip reader.
The Princess of Wales was seen giving her children a telling-off while they waved to crowds of royal fans on Saturday as the family attended the Trooping the Colour Parade.
The special event marked a special day for King Charles as he celebrated his birthday.
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The Daily Star reports how the children of the Prince and Princess of Wales captured the attention of royal supporters as they rode to Buckingham Palace.
Prince George, Princess Charlotte and Prince Louis were seen waving and smiling to the crowds – even making "cheeky" comments and faces along the way.
But the mischievous young royals apparently received a warning about how they should be sitting while riding in the horse-drawn carriage. Lip reader Jeremy Freeman claims to have spotted Kate telling her children: "Do not look behind whilst on the coach”
But the camera moves over to the children and shows Charlotte apparently defying her mother's orders as she continues to look behind.
It comes as Prince Louis stole the show once again at Trooping the Colour today as he saluted the crowds who came out to watch King Charles' first birthday parade.
The youngest son of the Prince and Princess of Wales was in attendance at the Trooping the Colour ceremony to celebrate the birthday of the monarch.
Many royal fans were fixated on five-year-old Louis who could be seen saluting the crowds as well as pulling a range of excitable faces.
His "unique" waving style also made an appearance as fans on Twitter were left gushing over how he looked like he was doing an impression of window wipers.
The last time fans saw his wave was seen on the balcony was at the coronation of King Charles III on May 6.
Louis was seen tapping his hands down on the side of the balcony to mimic the sounds of the marching band's drums and waving his hands from side to side.