Prince George, Princess Charlotte and Prince Louis are known to lovingly call their grandfather King Charles, Grandpa Wales, but when it comes to Queen Camilla, they have an unusual moniker for her

Prince George, Princess Charlotte and Prince Louis (Image: Karwai Tang/WireImage)

The royal family might have a number of grand titles, but when they are behind closed doors, all formality is dropped. It’s common knowledge that members of the Firm have nicknames for one another – and it seems that William and Kate’s three children have come up with a surprising moniker for Queen Camilla.

George, Charlotte, and Louis are said to often talk about ‘Granny Diana’ and are said to refer to King Charles as ‘Grandpa Wales’. The nickname Grandpa Wales follows the same format as the Queen used for her grandad George V, who she referred to as Grandad England.

Queen Camilla at Westminster Abbey earlier this week (Image: UK Press via Getty Images)

But when it comes to Queen Camilla , she apparently goes by a different name to the traditional ‘grandma’ or ‘nanny.’ Camilla, who has five grandchildren of her own, plus the Wales kids and Prince Harry and Meghan Markle’s Archie and Lilibet, is referred to as ‘Gaga’.

According to the Sun , Camilla told Lady Gaga when they met during the 2016 Royal Variety Performance: “My own grandchildren call me GaGa. I don’t know if it’s because they think I am! It is funny but is still very sweet.”

It was previously revealed that Prince George had an adorable nickname for his great-grandmother, the late Queen, and called her “Gan-Gan”. Speaking back in 2016 after the birth of Princess Charlotte, Princess Kate said: “It’s very special having a new little girl…I feel very, very lucky that George has got a little sister.

“The Queen was really thrilled that it was a little girl, and I think as soon as we came back here to Kensington she was one of our first visitors here. George is only two-and-a-half and he calls her ‘Gan-Gan.’ She always leaves a little gift or something in their room when we go and stay and that just shows her love for her family.”

The Royal Family on the palace balcony during VE Day commemorations(Image: PA)

William and Kate are also said to have nicknames for one another. They were overheard using nicknames for each other at the Chelsea Flower Show in 2016, when they lovingly referred to each other as “darling” and “babe”.

William previously revealed that it was his mother, Princess Diana , who gave him his first ever nickname – “Wombat”. In a 2007 interview with NBC’s Matt Lauer, he explained: “It began when I was two. I’ve been rightfully told because I can’t remember back that far. But when we went to Australia with our parents, and the wombat, you know, that’s the local animal. So, I just basically got called that. Not because I look like a wombat, or maybe I do.”

And William was actually responsible for one of the late Queen’s more unusual nicknames, ‘Gary’. According to Daily Mail , while William was playing at Buckingham Palace as a child, he took a little trip and called out for help. But instead of shouting for ‘Granny’, he called for ‘Gary’- much to the confusion of everyone present.

The column reported : “A guest who went to help asked who Gary was, assuming it must be a member of the royal household. ‘I’m Gary,’ responded the Queen. “‘He hasn’t learned to say Granny yet’.”

Kate, meanwhile, was nicknamed “Squeak” as a young girl while attending St Andrew’s School in Berkshire. She later recalled: “I was nicknamed Squeak just like my guinea pig,” she said. “There was one called Pip and one called Squeak because my sister was called Pippa and I was Squeak.”