All eyes were firmly on Prince Louis when he took his seat for the Queen's Platinum Jubilee Pageant.
The four-year-old had already stolen the show at Trooping the Colour on Thursday with his cheeky antics on the Buckingham Palace balcony.
And when he made his appearance in the royal box for the Pageant yesterday, he did not disappoint royal fans who lapped up his dancing, raspberry blowing and his cute moment sitting on grandad Prince Charles' knee.
But one royal who didn't appear too keen on Louis' animated display was his older sister Princess Charlotte.
At one point during the Pageant, Louis was stood on a seat wedged between his mum Kate and Charlotte as they all watched the colourful performers go past.
Louis couldn't resist waving at them although his waving became a bit too enthusiastic - and it was sister Charlotte who appeared to tell him off and get him to calm down before she turned her attention back to the Pageant.
However, it wasn't the first time this weekend that Charlotte was on hand to keep an eye on her little brother.
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On Thursday during the Trooping the Colour when the children enjoyed their first public carriage ride, Charlotte was also spotted slapping down Louis' hand during another of his excitable waves.
In general, the young Prince has left royal fans and viewers delighted over the past few days.
The four-year-old was seen at various times cocking a snook, placing his hands over his face, and clenching his fists. He reacted with wonder at every event - and left people on social media in stitches.
One fan wrote: "Prince Louis being iconic as always." Another dubbed his facial expressions "legendary" while a third added: "He deserves his own meme section. I can't [deal] with how expressive his face is."
The enthusiastic youngster also couldn't stop himself from quizzing the Queen during her Platinum Jubilee celebrations.
He was photographed exchanging a few words with his great-grandmother as they awaited the planes and helicopters to fly overhead.
And a lipreader has told the Mirror what the pair appeared to be talking about - a nd 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 and painted the sky red, white and blue, Louis' excitement seemed to peak after Mr Freeman says the youngster exclaimed: "Yes yes yes."
