Royal chef Darren McGrady, who has worked at the palace for 15 years, has revealed all the details about the Prince and Princess of Wales' rules regarding their children.

There is a certain set of rules that their children must follow as part of royal protocol. Prince George, Princess Charlotte and Prince Louis are not allowed to sit at the dinner table with adults until they have learned the art of polite conversation. "This rule has always been in place — even on special occasions like Christmas," McGrady says.

Photo by Millie Pilkington. The photo shows Prince William and his three children: Prince George, Princess Charlotte and Prince Louis / Photo: Associated Press

In addition, the nannies of royal families, then and now, are responsible not only for disciplining children, but also for "educating their taste."

"The babysitter always supervised the menu and made sure they ate a balanced meal, this included not only lots of healthy vegetables, but also introduced them to new adult dishes," the chef recalls.

As is the case with most children, getting the royal children to eat vegetables proves to be a daunting task. That was the case when William and Harry were children, and so it is now.

Kate and William with their children / Photo: Associated Press

Earlier we talked about the favorite dishes of members of the British royal family.