HE may be the Prince of Wales and the future king of England to us regular folk, but it seems Prince Charles is just 'grandpa' to his daughter-in-law Kate Middleton.
The Duchess of Cambridge, 39, appeared to have used the moniker for her father-in-law during a meeting at the G7 summit, according to a lip reader.
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Kate and Charles accompanied the Queen, along with Prince William, Camilla, at the Eden Project in Cornwall on Friday for an evening reception with some of the world's leaders.
Upon arriving, the duchess greeted her father-in-law, and a lip reader told that she said: "Hello Grandpa, how are you?"
Prince Charles is grandfather to Kate and William's three adorable kids - Princes George and Louis and cheeky Princess Charlotte - so the name is only fitting.
The pair also shared a sweet moment at Prince Philip's funeral back in April as Kate Middleton pecked grief-stricken Prince Charles on the cheek.
The lip reader also revealed some of the other remarks shared between the royal family as they walked through the gardens to meet Prime Minister Boris Johnson and his wife Carrie.
It's been reported that the Duchess of Cornwall, Camilla, was holding the Queen's "shawl" as she spoke with the monarch.
The lip reader claimed that Camilla had asked her mother-in.-law if she would like to wear the garment, to which the Queen reportedly said: "You have it."
During the dinner, Kate also paid a sweet tribute to her late mother-in-law Princess Diana, by wearing her beautiful three-strand pearl bracelet.
The elegant accessory worn on her wrist - by designer Nigel Milne - once belonged to Diana, who was seen wearing it on numerous occasions.
This includes a 1989 visit to Hong Kong when she wore a pearl-embroidered 'Elvis' dress and the Cambridge Lover's Knot tiara.
The Duchess of Cambridge, 39, wowed in a £3,000 white double-breasted coat dress by Alexander McQueen for the glamorous evening event, and finished off her look with nude heels and a simple white clutch bag.
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This comes as the Queen made a subtle nod to Meghan and Harry at the G7 summit in Cornwall.
And Kate Middleton, Jill Biden and Carrie Johnson all get the memo as they wow in pink at the G7 summit.
Meanwhile, we shared inside bargain hunter Carrie Johnson’s incredible £3,755 designer wardrobe for the G7 summit she HIRED for just £217.