One of Princess Diana’s famous dresses is now up for sale. The navy blue, floor length dress that the princess wore at the White House in 1985 is being auctioned to the the highest bidder. Nine of her other dresses will also be on sale during the March 19, which is supposed to bring in $12 million. Diana’s dress became iconic after she was photoed dancing with John Travolta in it. See the dress in the gallery.