To most she is The Queen, but to Prince George she's simply "Granny".
Royal rules were relaxed for the first time, allowing a crowd of about 3500 to gather in a paddock near St Mary Magdalene Church for the christening of Princess Charlotte on the weekend.
A clip obtained by the UK's Mirror newspaper showed the Duke and Duchess taking their young children to the Queen's Sandringham House after the intimate ceremony.
"We can go back to Granny's," William tells nearly two-year-old son, George who toddles past cooing, cheering and clapping royal watchers.
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Fans camped overnight to catch a glimpse of baby Charlotte, her first public outing she left hospital on May 2 at just a few hours old.
As Prince George left the christening holding his father's hand he looked behind him to check the rest of the royals and Middletons were on their way.
"They're coming, they're all coming," William reassured him.
It's well known William and Harry refer to the Queen as granny. They shouted "Go, Granny" when the Queen 'parachuted' into the Olympic Games opening ceremony in 2012 in a James Bond-themed stunt.
And Prince Harry said: "To me she's just Granny", when asked about the Queen in a Diamond Jubilee interview.