The Duchess of Cambridge is known for her sporty nature and her love for one game in particular - tennis.
Not only is she a regular at Wimbledon, she's also shown off her skills against the British women's number one tennis player Emma Raducanu.
Her affection for the sport has clearly rubbed off on her children with Prince George and Princess Charlotte reportedly taking tennis lessons.
And now she's let slip that her youngest son, four-year-old Prince Louis has also joined his older siblings in learning how to play tennis.
It came out during Kate's chat with Novak Djokovic on Sunday - just minutes after he won his seventh Wimbledon title.
After presenting him with his trophy, TV cameras showed Kate in conversation with the seven-time Wimbledon winner as his name was added to the honours roll for 2022.
Djokovic told the Duchess that he had noticed George in the royal box and asked if he played tennis.
Kate told him: "George is playing. They're all playing, even Louis who's four. They're all keen."
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It is believed that the Cambridge children have their tennis lessons at the exclusive Hurlingham Club in Fulham - not far from Kensington Palace in West London.
The club, which also has facilities for Croquet, Golf and Polo, charges £1,400 a year for membership.
In 2019, an insider told HELLO that the Cambridge children love visiting the club and that they go into the clubhouse afterwards for lunch or tea and act "just like any other normal family".
However, it seems that George has previously been treated to a tennis lesson by a very special teacher - eight-times Wimbledon champion Roger Federer.
He previously revealed he had offered his advice to the future King - and even said he showed early promise.
Federer is a friend of the Middleton family and was even a guest at Kate sister Pippa's wedding in 2017 to James Matthews.
And in a documentary, Kate also revealed her mum Carole is a huge Federer fan.
She said: "Roger is my mother’s heartthrob. I don’t think she will mind me saying that! I think he probably knows that too.
