WATCH: Prince George has adorable reaction to Prince William getting scolded by Queen Elizabeth
Prince William might be the future King of England, but in his family, there's only one boss.
The Duke of Cambridge appeared alongside his wife Kate Middleton and two children Princess Charlotte (one) and Prince George (three) for the Trooping the Colour ceremony honouring Queen Elizabeth's 90th birthday.
And while he played the diligent dad bending down to explain the occasion to his toddler son, his grandmother quickly scolded him for it.
"William, stand up!" she said, in a clip which didn't feature on the BBC broadcast.
Check out Prince George's very appropriate reaction, here:
Come for the queen scolding William, stay for the George facepalm. pic.twitter.com/etvmofiU5m— Brandon McGinley (@brandonmcg) June 15, 2016