When you think about friends, family or anyone who you love, you can often find yourself forming affectionate nicknames - some of them stick and some of them don't, and often, they're nothing like the person's real name.
Just like in every family, members of the royal family also have endearing names for one another, from Prince Harry calling the Duchess of Cambridge 'Cath' instead of 'Kate', to the late Prince Philip being referred to as PP.
Similarly, the Duke of Cambridge has an adorable little nickname which he has given to his daughter, six-year-old Princess Charlotte - which just so happens to be a different nickname than the one used by Kate.
The sweet name was revealed in 2019, when Wills and Kate were joined by the kids at the Royal Chelsea Flower Show, as Kate had helped to design a garden for the show.
While playing on a swing in the garden, William called out to Charlotte, asking her to come and give him a push, but instead of saying 'Charlotte', he calls for 'Mignonette.'
The French word is said to mean "small, sweet, and delicate" or "cute," and is pronounced like min-yon-ett.
Meanwhile, Kate has her own affectionate name for Charlotte, revealing during a trip to Northern Ireland in 2019 that she calls her daughter Lottie.
During an official royal visit, Kate met mum Laura-Ann and her son, who later took to Instagram to share their conversation.
"She asked how old Bertie is, and I said he is four and she said, 'Oh, he's the same age as Lottie.' She calls her Lottie," Laura-Anne wrote.
But while its only natural her family give her pet names, it turns out Charlotte could be set to inherit a rare royal title which has only been used seven times in royal history - Royal Princess Charlotte.
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