One former royal employee has shared what Prince Harry and Prince William’s sibling relationship was really like behind closed doors.

Prince Harry and Prince William pictured together in London in 2016 (Image: GETTY)

Prince Harry has had a strained relationship with his brother Prince William for many years, but one expert has shared what their relationship was like before their feud began.

Former royal chef Darren McGrady, who worked for the royals for 15 years, got to know William and Harry well during his time in the royal household – as well as their late mother, Princess Diana.

He revealed that despite the recent strained relationship, the brothers’ would previously bond over their favourite dinner that he would prepare for them as children.

According to the former chef, William and Harry enjoyed eating Cottage Pie when they visited Kensington Palace – and that they both loved spending time in the kitchen.

As reported by the Mirror, the former chef explained: “Whether it was to find out what was for lunch, or to just play hide and seek or to just come through and chat.

Prince Harry and Prince William with their late mother, Princess Diana (Image: GETTY)

“Sometimes they’d want to come through and cook. That was always a worrying experience but it was always fun having the boys in the kitchen.

“And although it was a royal palace, they were royal children and just like normal children, they were running around the house, having fun.”

When staying with their late mother at Kensington Palace, Mr McGrady said that the mother of two was keen to allow her sons’ to live as normal of a life as possible – even if that meant eating dinnner in front of the television.

McGrady also claimed that Diana once pointed out to him just how contrasting her two sons were in personality. The former chef shared that Diana had said: “William’s deep like his father, and Harry’s just an airhead, like me.”

Although William remains a senior member of the Royal Family, Harry now resides in the US with his wife Meghan Markle and their children, Archie and Lilibet.