Prince Philip told Kate Middleton to keep her toes on the ground as she married into the Royal Family in 2001.
The Duke of Edinburgh compared Kate to the former Princess of Wales and warned her not to follow the late Princess’s footsteps.
Author Gyles Brandreth writes in his book: "When Catherine Middleton came along as a potential bride for his grandson, Prince William, the Duke of Edinburgh was, he told me, ‘relieved to find her such a level-headed girl’.
"‘If you believe the attention is for you personally,’ he warned, ‘you’re going to end up in trouble. The attention is for your role, what you do, what you’re supporting.
"It isn’t for you as an individual. You are not a celebrity. You are representing the royal family. That’s all. Don’t look at the camera.
"The Queen never looks at the camera. Never. Look at who you’re talking to,’” the Duke told Kate, as per the author.
Oscars issues new set of guidelines for the upcoming 98th award ceremony
Kate Cassidy opens about her 'final goodbye' with Liam Payne
Aimee Lou Wood hints at 'beef' with Wonder Woman Gal Gadot?
The Duke of York receives fresh blow from his beloved person
Timothée Chalamet's mom breaks silence over her son's romance with the 'lovely' Kylie Jenner
Princess Beatrice's husband shares photos from The Big Apple hours ahead of The Duchess' big appearance