CANNES, FRANCE - MAY 15:  Prince Charles And Princess Diana Arriving At The Cannes Film Festival For A Gala Night In Honour Of Actor Sir Alec Guinness They Are Accompanied By The Lady Mayor Of Right Carrying Walkie-talkie Radio Is The Prince's Bodyguard Colin Trimminthe Princess Is Wearing A Pale Blue Silk Chiffon Strapless Dress With A Matching Chiffon Stole Designed By Catherine Walker.  (Photo by Tim Graham Photo Library via Getty Images)