Princess Eugenie’s dress featured a neckline that folds around the shoulders to a low back that drapes into a flowing full length train, Buckingham Palace said.
The low back feature was specifically requested by Princess Eugenie, who had surgery aged 12 to correct scoliosis, a spokesman added.
Celebrity guests at Eugenie's wedding include David and Victoria Backham, Sir Elton John, Ed Sheeran, Robbie Williams, Ellie Goulding, James Blunt and more.
