Prince George, Princess Charlotte and Prince Louis are said to be setting off to a new school this September.
The Cambridges are reportedly upping sticks from Kensington Palace and moving into the four-bedroomed Adelaide Cottage on the Queen's Windsor Estate.
Their children are likely to be educated locally, and are rumoured to be joining Lambrook School in Berkshire as day pupils.
The co-educational school charges up to £7,000 a term - plus a further £1,481 for boarding - and many of its leavers eventually head off to prestigious secondary schools including Eton.
It caters for both boys and girls, making it a more convenient option for the school run as both George and Charlotte can attend, as opposed to the all boys Ludgrove and Papplewick.
They will have to attend Saturday School which takes place each week, however, followed by an afternoon of sports fixtures for pupils in Year 5 and above.
Lambrook also offers weekly and flexi-boarding for those aged between 7 and 13, with 75 per cent of the prep school taking part in some way.
One source told The Telegraph : "Even the most local parents like the idea of their smalls being able to stay over for a night when necessary – it means they can throw dinner parties and have hangovers without having to get the kids to school the next day."
And a parent, who sent their child elsewhere, said: "Everything at Lambrook is freshly painted; it’s very blue chip parent wise and the children are all very polite.
"On our open day tour the children all made personalised Lambrook key rings in the DT centre, and were sent home with Lambrook wooden yo-yos in a Lambrook reusable jute bag – I dread to think how much it cost them."
In a guide by Talk Education on the best private schools in Britain, Lambrook is described as "pretty bucolic".
The guide added: "We spotted children cartwheeling on the croquet lawn, racing around with cricket bats and swinging from old tyres hanging from the trees, sporting proper rosy cheeks and a healthy outdoorsy glow.
"The school is anchored around a pristine, grand white country house, with a nursery and pre-prep on site. There’s a sense of delicious freedom and fresh air."
William and Kate have reportedly been seen visiting the school "multiple times" - with William even chatting to one pupil about Latin classes.
Making the move from London to Windsor would be a huge step for the Cambridges.
But one royal insider told the Daily Mail that the relocation is due to William wanting to be closer to the Queen as she continues to delegate additional royal duties to him.
William is said to speak to his grandmother, who mostly spends all of her time at Windsor Castle, on the phone several times a week.
The insider said: "It's one of the things that has hastened their move to Berkshire this summer. Losing the Duke of Edinburgh has a left a big hole in all their lives. He was a great counsel to William and he feels very protective of his grandmother."
