Prince Louis displayed some decidedly non-regal behavior while watching the Platinum Jubilee Pageant on Sunday.

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The 4-year-old was caught putting his hand over mother Kate Middleton’s mouth in a video that has since gone viral on social media.

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When the Duchess of Cambridge, 40, tried to politely stop him – no doubt through gritted teeth – the boisterous lad made a series of faces, poked out his tongue and put his thumb to his nose while wiggling his remaining fingers.

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Louis also decided to stand on his chair and appeared to throw a cushion – which is when Kate made the wise decision to take a break for a spell with her youngest.

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Louis’ behavior even caught the attention of Mike Tindall, who is married to Prince William’s cousin Zara Tindall.

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Lipreaders also parsed that he succinctly told Charlotte to “move over” while on the balcony.

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Louis did end up joining his parents, siblings, Prince Charles, Camilla Parker-Bowles and the Queen on the Buckingham Palace balcony at the conclusion of the Platinum Jubilee Pageant

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but this time Mum was taking no chances. The Duchess stood directly behind her son, who bears a strong resemblance to her father, Michael Middleton, and reined him in when he moved forward

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