The 51-year-old catwalk star took to Instagram to pay her tributes to the Princess of Wales, where she recalled her visit to the Kensington Palace years ago.
"Remembering this inspiring woman today. This photo was taken at Kensington Palace. Princess Diana had somehow got the number to my office and called herself to ask for me. My assistant was in shock! We finally connected and she asked if the next time I was in London I would come by for tea - I think Prince William was just starting to notice models and she thought it would be a cute surprise for him and Prince Harry.
Princess Diana passed away at the age of 36 on August 31, 1997.