In a no-holds-barred interview, Darren McGrady, who worked for the Windsors as their personal chef between 1982 and 1993, reveals some of the craziest eating habits of the royal family.

Harry and William love fast food, especially McDonald’s

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The diet of a prince doesn’t just revolve around lobster platters and foie gras (as most of us are inclined to believe). While Prince Harry and William are royal princes by stature, they are known to have more common palates. Former royal family personal chef Darren McGrady told Marie Claire, “I remember Princess [Diana] came into the kitchen one day and said, ‘Cancel lunch for the boys I’m taking them out, we’re going to McDonald’s. And I said, ‘Oh my God your royal highness, I can do that, I can do burgers.’ And she said, ‘No, it’s the toy they want.’ Yeah, the boys loved McDonald’s, and going out to pizza, and having potato skins—sort of the American foods.”

Princess Diana was on a very strict diet, but nobody suspected her bulimia

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While most of us now know about Princess Diana’s bulimia, you’d be surprised to hear about the extent to her strictly enforced diet. McGrady reports that he used to make her fat-free versions of dishes, and she would “trick” fellow guests at the table into thinking she was eating the same thing. In addition, red meat was completely off limits, and every meal was curbed into healthy eating: “One day she said to me, ‘Darren, I want you to take care of all the fats, and I’ll take care of the carbs at the gym.’ We changed everything, I threw out my Buckingham Palace recipe book and got into healthy eating,” says McGrady. “When she was at Buckingham Palace, her bulimia was definitely a hidden thing. We didn’t know about it. It wasn’t until she confronted it, and everyone put two and two together, that she started really healthy eating…she liked dishes like stuffed bell peppers and stuffed eggplant—she loved fish.” Here are more secrets no one knew about Princess Diana until after her death.

Prince Philip was not into Charles’ organic food

organicFrederic Legrand – COMEO

Apparently, green eating just isn’t for everyone. According to McGrady, Prince Philip wasn’t as keen on organic fare as Charles was. “We always used to get a hamper [full of food and treats] from Harrods—a thank you gift for shopping with them. Prince Philip came into the kitchen and there were two hampers. He said, ‘Oh, is this a Harrods hamper?” I said, ‘No, your highness, this is a hamper the Prince of Wales brought with him.’ He looked puzzled so I opened it up and I said, ‘It’s all organic.’ And he said, ‘Oh, bloody organic!’ And just shook his head and walked out.”