Prince George's nickname for Queen Elizabeth II is too bloomin' adorable.

Prince Harry and Meghan Markle’s wedding is over (well and truly) and we are having slight royal family withdrawals, to be honest.

Which is how we found ourselves looking at clips from the 2016 ITV documentary in honour of Queen Elizabeth’s 90th birthday aptly titled, Our Queen At Ninety. 

And that’s where we learned a delightful little tidbit from the Duchess of Cambridge. While being interviewed for the film, the royal, who had then given birth to Charlotte less than a year prior, shared with the world exactly what Prince George calls his great-grandmother.

“George is only two and a half and he calls her Gan-Gan,” she said.

Gan-Gan. How bloody adorable.

Prince George with his Gan Gan at Princess Charlotte's christening in 2015. Image: Getty

The now mum-of-three was also sharing details of the bond the Queen has with her great-grandchildren.

"She always leaves a little gift or something in their room when we go and stay and that just shows her love for the family," she said.

"The Queen was really thrilled that [Princess Charlotte] was a little girl, and I think as soon as we came back here to Kensington she was one of our first visitors here."

In case you are wondering what the rest of the royal family calls the Queen (because we were), Prince William and Prince Harry call her Granny - although according to the Daily Mail's royal expert Richard Kay, William used to call her "Gary" when he was little because he couldn't pronounce Granny.

And as we know from a clip from her 92nd birthday in April that went viral for the Queen's reaction (it looked a whole lot like she rolled her eyes) - Prince Charles calls his mother Mummy.