Former royal chef reveals what Prince Harry and Prince William's childhood was really like

Growing up at Kensington Palace with chefs, nannies and an abundance of palace staff roaming around the grounds, it's easy to assume that Prince William and Prince Harry's royal childhood was met with stringent rules and posh meals.

However, despite their royal titles, and figures like the Dalai Lama, Elton John and Emma Thompson occasionally dropping by the palace for lunch, the princes' upbringing was actually far different from what is easy to assume -- and a lot of that could be attributed to Princess Diana. Harry and William rode the bus, waited on line like the rest of the tourists at Disney World and were frequently treated to McDonald's runs with their mother.

"She very much wanted to get us to see the rawness of real life," William told ABC News' Katie Couric in 2012. "And I can't thank her enough for that, 'cause reality bites in a big way, and it was one of the biggest lessons I learned is, just how lucky and privileged so many of us are — particularly myself."

It seems that these lessons that Diana imparted were evident even in Prince Harry and Prince William's private life, away from the scope of the media. "Very little has changed, they were always so interested in what you were doing, which I think is unusual for a child… They're so warm and caring," said former royal chef Carolyn Robb in a new Yahoo interview for "The Royal Story."

Robb, who worked for the family for 11 years, called the family incredibly normal despite their royal titles. "Charles and Diana were very professional about everything, they kept everything very normal for the sake of William and Harry."

She continued, "People tend to imagine that every day it's lobster, foie gras and caviar, but Prince Charles and Princess Diana were just like normal people, they're just like you and I."

The chef, who wrote the "The Royal Touch" cookbook about her time working for the family, also explained the brothers would often join her as she worked.

"When William and Harry were small, they loved to come into the kitchen. They would fly in for five minutes and make something. Being an old palace with old floorboards you could usually hear them," said the chef.

It seems that Harry, unsurprisingly, had a particular cheeky streak. "We fortunately had low down cupboards where we could hide Harry; although his giggling usually gave him away."