A lip reader has revealed what Prince William told cheeky Prince Louis during a military parade to mark the 80th anniversary of VE Day. Louis was joined by his siblings, Prince George, 11, and Princess Charlotte, 10, who made a rare public appearance with their parents, William and Princess Kate, to see the spectacle in central London on Monday (May 5).

Louis, seven, bobbed up and down as the parade passed in front of him to the sound of military music. Seated between William and George, the youngest of the Waleses' children appeared transfixed by the parade. At points, he could be seen rolling his eyes while turned towards George and engaged in conversation with his father.

Nicola Hickling, founder of LipReader Ltd, told the Express what Louis and William were saying to each other as the marching Armed Services personnel passed in front of them.

William said to Louis, "They are grabbing their bars, isn’t it great?" to which the young royal replied: "They are marching straight."

The next in line to the throne then laughs, leading Louis to roll his eyes again. Prince William then asks if Louis can see those on parade turning or lining up. Louis then replies: "They’re going in a circle."

In another clip, Louis can be seen pushing his fringe back from his head and blowing it in the air as he breathes out sharply.

He can then be seen smiling and looking intently at the parade before asking: "Did you see him kick his horse? ... I think he wants him to go faster."

Louis showed pride in his father at another point in the parade, appearing to brush something from William's uniform. In another adorable moment, he also appeared to tug his dad's aiguillette, the ornate gold braid across his shoulder.

The young prince sent royal fans into a frenzy on social media, where there was an outpouring of admiration for the fourth in line to the throne.

One person said: "Prince Louis rubbing Prince William’s shoulder! So adorable." Another wrote: "Awww Prince Louis was brushing off his father's uniform. What a button he is."

After the procession, Louis joined King Charles, Queen Camilla, the Waleses, Princess Anne and further members of the Royal Family to watch a spectacular fly past from the balcony of Buckingham Palace.

Louis is most likely to have enjoyed the display especially. In 2023, it emerged that the youngster wants to be a fighter pilot when he grows up.

At an event during King Charles and Queen Camilla's coronation weekend, Louis was asked if he wanted to be an artist when he was older.

To which he replied: "No, I want to be a fighter pilot."