As the UK celebrated the 80th anniversary of Victory in Europe Day on Monday (5 May), the royal family joined in the commemorative events — and once again, Prince Louis captured hearts with his playful and charming behavior.

The Prince and Princess of Wales appeared on the Buckingham Palace balcony along with Prince George, Princess Charlotte, and Prince Louis, just in time to watch a Red Arrows flyover ahead of the official VE Day on Thursday.

Later on, during a military parade, Prince Louis sat next to Prince William, who was dressed in full military uniform, when a sweet and memorable moment between the two took place.

At one point, the seven-year-old was spotted brushing rain off his dad’s jacket. Prince William then gently tapped Louis on the leg and, according to lip reader Nicola Hickling, said: “Look at this, I think it’s going to be quite wet today.”

Louis, known for his cheeky sense of humor, reportedly replied (per The Sun): “Wasn’t this supposed to be fun?”