With their brand new uniforms, big smiles and the support of their mum and dad, Prince George, Princess Charlotte and Prince Louis have headed to their brand new school.
Heartwarming images showed the young royals alongside their parents the Duke and Duchess of Cambridge walking through the gates of Lambrook School in Berkshire for the first time before shaking hands with their new headmaster Jonathan Perry. The school is a co-educational prep school for 615 boys and girls aged three to 13 and is set on 52 acres of countryside, close to their new home of Adelaide Cottage in Windsor.
It is a big change for George and Charlotte, who had previously been pupils at Thomas's Battersea in London - and it is also Louis' first school having finished Willcocks Nursery in Kensington before the summer.
So what can the Cambridge kids expect at the prestigious school, what will they learn and how much are the eye-watering fees to attend? Here we take a look...
'Pretty bucolic'
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It has been reported that William and Kate visited the school "multiple times" before deciding it was the perfect choice for their children - with William even chatting to one pupil about Latin classes during a secret visit.
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."
'Stimulating and broad education'
Like all other pupils across the world, George, Charlotte and Louis' will be at Lambrook School to learn.
And according to the school's website, they can look forward to being taught a "stimulating and broad education in a nurturing environment".
Older duo George and Charlotte will be part of Lambrook's Prep School, where they'll get lessons in all the usual subjects, including Latin and Greek.
The school says pupils in the Prep School will receive "exceptional teaching from dedicated, enthusiastic, talented and inspiring staff" with George also getting to take part in an afternoon of sports fixtures every week.
Four-year-old Louis will be in Lambrook's Pre-Prep section and can take classes to learn swimming, French and music and join in with after-school activities including cooking, tennis and ballet.
He will also get to attend “Forest Fridays” where the younger children head into the school grounds to build dens and roast marshmallows near a fire.
Facilities and boarding
As well as having the usual classrooms, Lambrook also has some impressive facilities that George, Charlotte and Louis can try out.
One is its very own orchard complete with bees, chickens, and even pigs.
There is also woodland for the little ones to explore, a nine-hole golf course, a 25-metre swimming pool, a cricket pitch, squash courts and a dance studio.
The school, which has its Christian faith "at the centre of its foundation", offers trips away for all year groups, and in the past year has taken students to Sweden, France, Italy, Iceland, Somerset, Dorset, South Africa, and the Isle of Wight.
Alongside a focus on sport, the school boasts a new £6m development that offers pupils a "remarkable environment" for Art, Design & Technology and the Performing Arts. They say past students have gone on to perform in London's West End.
Although the Cambridges will be day pupils at Lambrook, the school also offers weekly and flexi-boarding for those aged between seven 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."
Big change for George and Charlotte
Not only is starting a new school a big change for George and Charlotte, they will also see another big change - school on a Saturday.
They will have to attend Saturday School which takes place each week - meaning no lie-ins for the pair on weekends.
School motto
So with a wide range of lessons, impressive facilities and countless after-school activities, what can William and Kate expect their children to get from the school?
Well, its website states: "We have a reputation for providing an outstanding education, raising the achievement levels and expectations of children of all abilities. Lambrook has been laying the foundations for its pupils’ futures.
"During their time with us, we give our pupils the ‘Feathers to Fly’ so that when they leave us, they will spread their wings and will take flight; leaving Lambrook as confident, happy, engaging, mature, considerate and thoughtful young adults who are outward-looking global citizens."
Former royal pupils
However, the Cambridge kids aren't the only royals to have graced Lambrook.
The school, which dates back to 1860, also has another royal connection as in 1878, two of Queen Victoria’s grandsons, Prince Christian Victor and Prince Albert of Schleswig-Holstein, were pupils there.
Victoria used to travel from Windsor Castle to Lambrook to watch her grandsons in plays and cricket matches.
Eye-watering fees
Being a pupil at Lambrook doesn't come cheap for parents, and the fees for the three Cambridge children could set William and Kate back more than £53,000 every year.
Fees for Louis' reception class per term are £4,389, Charlotte's Year Three fees are £6,448 per term, while George's schooling in Year 5 is £6,999 per term.
Jonathan Perry, headmaster at Lambrook School, previously said: “We are delighted that Prince George, Princess Charlotte and Prince Louis will be joining us this coming September and very much look forward to welcoming the family, as well as all of our new pupils, to our school community.”