Princess Kate Middleton may be married to Prince William, but sometimes he's just like one of the kids, according to a new book about the royals. An excerpt from Tom Quinn's upcoming book, Yes Ma'am: The Secret Life of Royal Servants,

"Before Kate realised that as a senior royal you have to dress carefully, having taken advice, she once bought an outfit that William considered inappropriate," the advisor said. "He told Kate she looked as if she’d just run through a charity shop covered in superglue. Everyone thought this was very funny, including, to her credit, Kate."

Prince William and Princess Kate are said to enjoy sharing a joke together, with Kate often mocking her husbands likeness to one of his ancestors