It will go down in history as the dress that first ensured Kate Middleton caught Prince William's eye.
And the see-through affair - estimated to fetch at least £10,000 - was sold at £78,000 when it was put under the hammer at Kelly Taylor Auctions on Thursday.
A man at the back of the London auction room, who would not give his name, bought it for an individual he would only name as 'Nick from Jersey'.
The 29-year-old future royal wore the dress to traverse the St Andrew's University catwalk for a charity fashion show in 2002 - whilst fellow student Prince William was sitting in the front row.
CLICK ON PHOTO FOR GALLERY
It was designed by fellow student Charlotte Todd and was originally meant to be a skirt. However at the last minute, organisers decided that Kate's enviable figure was toned enough to pull it off as a dress.
Charlotte told Associated Press: "If it is true that my design helped change the Prince's interest in Kate from platonic to romantic as has been reported, then I am pleased to have played a part - however minor."
She added proudly: "I never imagined as I sat knitting this piece it would be so important."
The auction also featured two gowns worn by Princess Diana which went for £30,000 and £36,000 respectively.