Prince Louis was seen asking the late Queen one concerned question during her Platinum Jubilee celebrations last year and the former monarch gave him a very dry reply, according to a lip reader.
During a flyover of the Red Arrows during the former monarch's royal celebrations, cheeky little Prince Louis stole the show as usual on his great-grandmother's special day.
The youngster was spotted pulling a series of silly faces during the special occasion last summer as he looked hugely excited watching the RAF flypast.
At one point, Louis was seen exchanging a few words with the Queen just months before she died as they waited together for the planes and helicopters to arrive.
An expert lipreader told the Mirror what Louis was keen to know as he questioned his great grandmother.
According to Jeremy Freeman, Louis asked: "Are the Red Arrows coming?"
To which the Queen dryly replied: "I hope so."
When the Red Arrows did show up they painted the sky red, white and blue much to little Louis' excitement, who screamed: "Yes, yes, yes."
He also added that the former monarch said: "There it is," before Louis added: "Oh Red Arrows - whoa."
Mr Freeman picked up on another exchange when the young Prince was seen covering his ears while the planes roared over Buckingham Palace and took the shape of the number 70 to celebrate the Queen's historical seven-decade reign.
The lip reader said that the Queen then said: "Ohh fun" with Kate saying "amazing" and Charlotte adding "Wow".
As Louis covered his ears, Mr Freeman claims he said: "Woah - that was loud" while Kate admired her son and said to Prince William "look at him".
The lip reader's claims come as another expert revealed how Louis' presence during the Trooping The Colour brought out a "childlike excitement" in Her Majesty.
Body language expert Judi James said that Louis' cute and cheeky behaviour rubbed off on the then 96-year-old Queen, as she was seen grinning 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 added: "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."
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