Selling for more than 11 times the estimate, a fan has paid $1,148,080 for the blue cocktail dress.
Jacques Azagury designed the dress, which Diana wore during a 1985 supper at Palazzo Vecchio in Florence.
The Princess wore it again just a year later when she watched her friend and opera singer Kiri Te Kanowa perform in Vancouver. Report by Gracex. Like us on Facebook at http://www.facebook.com/itn and follow us on Twitter at http://twitter.com/itn