Princess Diana Gave Prince William Advice Before Royal Outing (Exclusive)

"25 Years Later: Princess Diana Remembered," a special tribute episode of Access Hollywood, will air Aug. 31 to honor the late royal and her legacy on the 25th anniversary of her death. In a preview of the exclusive episode, Access contributor Patrick Jephson, who was Princess Diana's former private secretary, tells Access the advice she gave Prince William before his first royal walkabout. "I remember Diana took him to one side and said, 'You're going to meet a lot of people today. You can only spend 30 seconds with each of them. Remember, that is going to be a lifetime's memory for every person you meet,'" he recalled. Access contributor Ken Wharfe, who was Princess Diana's former protection officer, also shares how he thinks Diana was a "brilliant" mother.