Royal fans were left in stitches at Prince Louis ' reactions to the flypast - as he stole the show for viewers.
The four-year-old could be seen monetarily covering his ears as the noisy planes roared overhead during the event that kicked off four days of celebration for the Queen's Platinum Jubilee.
Before that, he could be seen waving at the planes and chatting to the Queen during the incredible display.
At one point, he appeared to yawn, as his mother whispered in his ear before he turned to his great-grandmother to ask a question.
His siblings Prince George and Princess Charlotte could be seen looking on in excitement, as they were joined by their mum the Duchess of Cambridge and dad Prince William.
Follow live updates from the Queen's Platinum Jubilee celebrations here.
One fan gushed: "Prince Louis chatting with the Queen is everything."
"Prince Louis is stealing the show," shared another. "Prince Louis screaming crying at the planes being too loud will undoubtedly be my favourite Jubilee moment," commented a third.
"Absolutely killing myself at Prince Louis’ whilst the aircraft fly over," said another.
Working members of the Royal Family crowded together on the balcony to watch the fly-past.
Love the royals? Sign up for the Mirror's daily newsletter to get all the latest news on the Queen, Charles, Kate, Wills, Meghan, Harry and the rest of The Firm. Click here to sign up.
Huge cheers of “hooray” erupted from the thousands of royal fans on The Mall in front of the palace as the Royals crowded together on the balcony.
As aircraft approached, the Queen could be seen looking ahead and smiling, while wearing sunglasses.
Earlier in the day, Princess Charlotte could be seen restraining Louis, four, during the Trooping the Colour parade.
The Cambridge children seemed excited as they took part in the military parade for the first time.
And Louis' enthusiastic waves drew the attention of his big sister, after he waved enthusiastically to the crowd from his seat between his two older siblings.
Charlotte could be seen laying her hand gently on his arm - possibly in a bid to cool his crowd-pleasing duties.
Pick up your collectors edition OK! Magazine Platinum Jubilee Special - in all good newsagents and online now for just £9.99.
