Following Princess Diana's death, the Duchess "felt Andrew could have done more" to help smooth her transition into the royal family, a source told the publication.
The dress features a low back that shows off her scoliosis scar.
When Princess Eugenie stepped into St. George's Chapel at Windsor Castle wearing her Peter Pilotto and Christopher De Vos dress, the crowd behind her audibly gasped.
One noticeable absentee will be Camilla, the Duchess of Cornwall, the wife of heir-to-the-throne Prince Charles, as she is carrying out an engagement in Scotland.
The dress was one of the most copied of her time, and afterward donated to the Metropolian Museum in NY.
Princess Eugenie arrives for her wedding to Jack Brooksbank wearing the Greville Emeral tiara. She has said previously it's important for people to show their scars.
Princess Eugenie is the second child of Prince Andrew and Sarah Ferguson, Duchess of York.
Jack's brother, Thomas Brooksbank, 29, who was the best man stood nervously at the altar in a dark suit, white shirt and deep orange tie, which paired nicely with the autumnal flowers inside the chapel.
The dress code calls for a morning coat for male attendees and a day dress and hat for women.
A smattering of celebrities are expected to be among the guests with the daughter ex-Take That singer Robbie Williams one of the bridesmaids.
According to the salon website, Sonnie has years of experience doing bridal hair and a styling session with her will set you back £150 for the hour.
"In fact, I would go so far as to say he was deeply unhelpful when support would have meant a huge amount to her and the Prince".