It's hard to believe Princess Diana died almost 30 years ago. Since then, interest in the former Princess of Wales has only increased, and many ex-Royal Family employees have written books about their experiences. According to one of Princess Diana's former butlers, the royal kept one secret hidden in a drawer in her home.
Writing in his book A Royal Duty, former royal butler Paul Burrell revealed that Princess Diana used to sell her old clothing in order to generate money to spend on her sons, Prince Harry and Prince William.