A lip-reader has revealed the pressing question Prince Louis asked the Queen on Wednesday as they stood on the Buckingham Palace balcony during her Platinum Jubilee celebrations.
The four-year-old stole the show as he pulled playful faces and looked hugely excited during an RAF flypast that ended with a display by the Red Arrows.
At one point Louis could be seen exchanging a words with his great-grandmother as they waited for the planes and helicopters to fly overhead.
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Now, a lipreader told the Mirror what the pair appeared to be talking about - and it seems Louis was eager to know one thing.
According to Jeremy Freeman, an expert in lipreading, Louis asked: "Are the Red Arrows coming?" To which the Queen very dryly replied: "I hope so."
When the Red Arrows did show up, Louis' excitement seemed to peak and Mr Freeman says the youngster exclaimed: "Yes yes yes."
He also added that the Queen then said: "There it is" before Louis added: "Oh Red Arrows - whoah."
Meanwhile, Mr Freeman also picked up on another exchange when young Louis was seen covering his ears as planes roared over Buckingham Palace in the shape of the number 70 - the number of years in the Queen's reign.
He says that on seeing this, the Queen said: "Ohh fun" with Kate saying "amazing" and Charlotte adding "Wow".
As Louis covered his ears, Mr Freeman says he said: "Whoah - that was loud", while a proud Kate said to Prince William "look at him" - about their young son.
The lipreader's revelations come as another expert said Louis' adorable appearance at Trooping the Colour during the RAF flypast brought out a "childlike excitement" in the Queen.
According to body language expert Judi James, Louis' cute and spontaneous behaviour had clearly rubbed off on the 96-year-old British monarch, who was seen smiling throughout the spectacular flypast.
Judi told the Mirror: "William and Kate emerged wearing their serious facial expressions, with William directing their children into position before standing apart from Kate to ensure a good spread of parental guidance.
"As the fly-past evolved though, we were treated to the strength of the bonds between the Queen and little Louis. His body language was the most spontaneous and at one point he even moved in front of the Queen.
"Leaning over the balcony, looking a lot like Prince Charles did at his mother’s coronation, his body language signals veered between an impatient slapping of his hands on the balcony to some face-rubbing and head-holding that suggested he couldn’t wait to see the planes.
"The Queen looked over at him with an indulgent facial expression though, chatting to her great-grandson as well as Kate. By the time the Lancaster flew over it looked as though Louis’s excitement had brought out some childlike excitement in the Queen, too.
"She clearly loved the roar of the engines and as Louis literally jumped up and down at the sight of the Red Arrows, the Queen smiled and chatted as though sharing the moment."
Celebrations are underway across the UK to mark the 70th anniversary of the British monarch's reign. Queen Elizabeth II is the first to reach the milestone.
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