Kate Middleton disappoints kids by not signing autographs

No autographs, please.

Kate Middleton spent time with a group of schoolchildren Monday at the Chelsea Flower Show in London — but it wasn’t all rosy.

A hundred kids from 10 schools sketched pictures of bugs and beetles to learn how to identify them, with some wanting Middleton, 41, to sign their designs.

“I can’t write my name,” Middleton was overheard saying, per People, “but I can draw.”

When the kids asked her again to sign her name, she reportedly said, “My name’s Catherine. I’m not allowed to write my signature, it’s just one of those rules.”

The Princess of Wales instead drew a flower for 7-year-old Ruby and a tree for another girl, according to the outlet.

She also sketched a pond with plants surrounding it for a third child.

The Post reached out to Buckingham Palace for comment.

According to a 2017 report from the Daily Express, Middleton is not allowed to autograph anything because there is a risk of her signature being forged.

The royal regulation also applies to Middleton’s husband, Prince William, and his younger brother, Prince Harry, according to the report.

It was also reportedly the case for Queen Elizabeth II, who passed away in September at the age of 96.

During Monday’s visit, Middleton gave a rare glimpse into her life as a royal when one of the schoolchildren asked what it’s like to be a princess.

“You have to work hard,” the mom of three replied, according to video footage obtained by the Daily Mail. “But you know the best thing about it is meeting kiddies like you.”

Signing autographs isn’t the only unique royal rule.

During a 2018 appearance on “MasterChef Australia,” Middleton’s mother-in-law, then-Duchess Camilla, confirmed the long-standing rumor that members of the royal family are not allowed to eat garlic.

During the show, one of the judges, Gary Mehigan, asked about foods banned for royals, to which Camilla, who has since been crowned Queen, replied, “I hate to say this, but garlic. Garlic is a no-no.”

She later clarified that it’s because members of the family are often at official speaking engagements, and they definitely don’t want their breath to stink.

There are also some fashion directives.

According to a 2018 report, the late Queen Elizabeth allegedly did not approve of wedge heels and expected many of the women in the family to wear nude tights with their dresses and skirts.

The queen also reportedly disliked nail polish that wasn’t neutral — with Middleton breaking that rule last month by sporting a crimson-colored manicure while stepping out for church service on Easter Sunday.

According to multiple outlets, Queen Elizabeth typically stuck to one light pink color made by Essie named “Ballet Slippers,” expecting other royal women to do the same.

Historian Marlene Koenig, however, previously told Town & Country there are no official rules regarding the polish royals can wear — which means the princess may not have broken protocol after all.

Middleton is typically photographed wearing a neutral-colored polish.