Princess Diana wanted to give her sons Prince William and Prince Harry a normal upbringing despite their ties into the royal family. However, some of her methods would have reportedly been an issue if Prince Charles learned what his wife was up to.

According to a former royal protection office, Diana made sure her children knew the importance of their royal duties, but she also wanted her sons to experience the joys of childhood

In the documentary “Prince William at Thirty,” Ken Wharfe revealed Princess Diana would forgo the luxuries of a gourmet palace meal for fast food restaurants. Although he was unaware of the trips to the chain restaurants, the former protection officer revealed the move that would have infuriated Prince Charles.

“I have to say that the prince would probably have had a fit to think his sons were eating McDonald’s,” the protection officer revealed.

However, BBC royal correspondent Jennie Bond revealed Diana felt the occasional trip to the fast food chain was a special treat for Prince William and Prince Harry. “[Diana] very consciously said: ‘There will be work days and there will be play days,’” she revealed.

“‘And on work days you have to dress up like young princes and you have to behave that way. But on your play days, yes you can wear your jeans, you can have baseball caps, you can eat a burger.’”

Princess Diana reportedly wanted her sons to have lives that were “as normal as possible.” During their days off, Diana would take the boys on fun outings, where they would opt out of using their royal status to receive exclusive perks.

During a trip to Thorpe Park, royal expert Katie Nicholl noted the Princess of Wales refused to skip the lines at the theme park, and wanted to be treated like a regular guest.

“There was no queue jumping and using their VIP status, the queued just like everyone else,” she said.

Nowadays, Prince William and Prince Harry continue to maintain their mother’s value of normalcy. Over the years, the men have broken royal traditions to remain grounded, despite their royal status.

Prince Charles and Princess Diana Prince Charles and Princess Diana are pictured attending a centenary service for the Royal College Of Music on Feb. 28, 1982 at Westminster Abbey, London. Photo: Fox Photos/Hulton Archive/Getty Images