Kate Middleton and Prince William “sugarcoated” her health woes when breaking the news to their youngest son Prince Louis, according to King Charles’ former butler.

The Princess of Wales, 42, revealed last week that she has been undergoing chemotherapy treatment after doctors discovered cancer during her planned abdominal surgery in January.

It’s understood that the royal decided to share the news with the world that particular day as it was before her and William’s three children, Prince George, 10, Princess Charlotte, 8, and Prince Louis, 5, left school for Easter break.

Kate Middleton and Prince William reportedly “sugarcoated” her health woes when breaking the news to their youngest son, Prince Louis.Geoff Robinson/Shutterstock

And with Louis being significantly younger than his siblings, the pair no doubt approached the situation in a less straight-forward manner.

“I’m sure it was a very difficult and very different conversation between children,” Grant Harrold, who worked for Charles for seven years when he was the Prince of Wales, exclusively told The Post.

“For instance, for Louis I’m sure the conversation was more sugarcoated than it was with George and Charlotte.”

“The older children can understand more, so I’d imagine it was a little more frank but undoubtedly staying positive, which is so important,” he explained.

“That’s why when you now look at the picture of Kate with her three children, it brings a tear to your eye. For any mother to have that conversation is huge and you can imagine Charlotte and George are going to be good supports for her.”

Middleton had waited to reveal the news of her cancer until her children were off from school for Easter break.Getty Images

Harrold noted that with Louis being so young, it’s fair to assume that he “probably doesn’t understand too much” about his mother’s condition.

“It’s a tricky one,” he tells us. “I’m sure the children will be handling it as any kids would be expected to handle it, but I think their parents are very good at being calm and collected, and I think that will rub off on the children.”

The Post has reached out to Kensington Palace for comment.

The Princess of Wales, 42, revealed that she has been undergoing chemotherapy treatment following her cancer diagnosis.AP

Carole and Michael Middleton are providing Kate with a sense of comfort and stability when it comes to their grandchildren.James Whatling / Splash News

As Middleton undergoes treatment, her parents, Michael, 74, and Carole Middleton, 69, are stepping in to support their grandchildren during this uncertain time.

Since the Prince and Princess of Wales made Windsor their permanent home base last year, Carole and Michael have been able to spend more time with their grandchildren.

The pair are based in Berkshire, England, located just a mere 40-minute drive from Windsor.

The Prince of Wales has been taking on more official duties while supporting his ailing wife at home.Ashley Crowden/Shutterstock

Queen Camilla has been taking on more royal duties in recent weeks.ZUMAPRESS.com

Over the weekend, Middleton and William left Adelaide Cottage in Windsor via helicopter to head towards Anmer Hall, located on the Sandringham estate, with their children for the Easter holidays.

The family will spend the break at the residence, where they’re expected to see King Charles III, 75, who is also battling cancer.

Understandably, the pair will stray from tradition this year by not joining the rest of the royal family for Easter services.

Instead, they will spend the long weekend together behind closed doors.

Charles, for his part, is set to attend a small Easter service with family that’s set to be of much smaller scale than in previous years.