The dress that proved elegance is the best revenge: We're all still obsessed with Diana's most famous gown 30 years on...now it's up for auction. Don't be surprised if it fetches over $1million, says LAURA CRAIK

The dress that proved elegance is the best revenge: We're all still obsessed with Diana's most famous gown 30 years on...now it's up for auction. Don't be surprised if it fetches over $1million, says LAURA CRAIK

Worn by Diana, Princess of Wales to an event at London 's Serpentine Gallery in June 1994, her little black dress didn't merely set a trend - it inspired a whole genre.