Prince William, 42, was seen playing a guessing game with his sons, Prince George, 11, and Prince Louis, seven, as they marked the start of VE Day commemorations on Monday.
The royals have enjoyed many flypasts over the years, and it seems that the Prince of Wales has an avid eye when it comes to his knowledge around the different aircraft.
The King and Queen and senior royals, including the Wales family, appeared on the Buckingham Palace balcony to watch a spectacular flypast with a finale by the Red Arrows.
Military aircraft, including the Voyager transport aircraft, a P8 Poseidon surveillance aircraft, Typhoon, and F-35 fighter jets, were also involved in the flypast, as well as historic Second World War-era aircraft.
Lipreader Nicola Hickling reveals to HELLO! what William and Kate said to their children during a sweet exchange on the balcony on VE Day, with Queen Camilla joining in too.
The Princess of Wales is seen asking her eldest son: “What is this, George?”
Hesitating, George replies: “Errr that’s erm a… [he is looking and thinking] I can’t see it yet.”
Louis is then seen saying: “It’s my turn.”
George, who is still thinking about which aircraft it might be, says “sorry” to his mother, before turning to his father, William, and asking: “When should they start, Papa?”
The Prince, bending down, replies: “It’ll start in a second.”
George then correctly points and says that the incoming aircraft is the Atlas.
William repeats what George says: “That’s the Atlas, you know” as he leans towards his stepmother, Camilla, and lets her know which plane is flying.
He adds: “That’s the Poseidon, they are the air fighters.”
George then correctly points and says that the incoming aircraft is the Atlas.
William repeats what George says: “That’s the Atlas, you know” as he leans towards his stepmother, Camilla, and lets her know which plane is flying.
He adds: “That’s the Poseidon, they are the air fighters.”
READ: Candid Captures: Kate And Charlotte Share A Tender Moments During VE Day Celebrations
According to Nicola, the Queen is seen joining in with the guessing game, with William responding to her: “It’s the wrong answer.”
A chuckling Camilla then says to William: “Are we playing this still? I need to try harder.”
The Prince responds: “That’s a UKMFTS, that’s similar to the Lancaster, I think.”
Kate’s instruction to children
Meanwhile, Nicola tells HELLO! the four-word instruction the Princess of Wales gives to Charlotte and Louis.
Bending down to her youngest son, Louis, Kate says: “When the flypast comes, you will see it smoke blue, white and red,” before gesturing: “Eyes to the sky.”
In the meantime, Louis points upwards: “Look at the back/black one, they have lots of tanks.”
As the aircraft soar over the palace balcony, Kate reacts, saying: “Wow!” with Louis exclaiming: “Woah!”
English