The Duke and Duchess of Cambridge's eldest children Prince George, seven, and Princess Charlotte, five, returned to their classrooms this week, after months of homeschooling during lockdown.
The young royals are now in Year 3 and Year 1 respectively at Thomas's Battersea school in south-west London.
While Prince George and Princess Charlotte are two of the most famous children around the world, they're not referred to by their royal titles at school.
The siblings are known simply as George Cambridge and Charlotte Cambridge to their school friends, in a nod to their parents' titles. This was also the case for Prince William and Prince Harry, who took on Prince Charles' title Wales as their surname at school.
READ: Prince William shares relief at his children going back to school
WATCH: Princess Charlotte arrives for her first day at school in September 2019
Members of the royal family traditionally don't use a surname; they are simply known by their first name in the public eye and His or Her Royal Highness.
They can also be known by the name of their house, such as Windsor, which may be different to their surname, such as Mountbatten-Windsor.
A declaration made by the Queen in Privy Council in 1960, said that male-line descendants of the monarch, without royal styles and titles, shall bear the name Mountbatten-Windsor.
William and Kate are regulars on the school run
When the Duke and Duchess of Sussex's first child Archie was born in May 2019, Harry and Meghan opted to not give their son a title and he therefore has the surname Mountbatten-Windsor.
While meeting emergency responders in Northern Ireland on Wednesday, Prince William opened up about how he felt about his children returning to school after lockdown.
MORE: What Prince George can look forward to at school from football club to cross-country running
The Cambridges spent lockdown at their Norfolk home Anmer Hall
Speaking to a police officer, William told her that he suspected other mums and dads were having the same experience as himself.
The father-of-three said: "I think every parent is breathing a sigh of relief that school has started again." He went on: "Five months – it's been wonderful, but it's been a long five months."
William and Kate's youngest child Prince Louis, who turned two in April, is likely to start nursery in January 2021. The tot could follow in his big sister Charlotte's footsteps and attend Willcocks Nursery School in Kensington.
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