The proud grandparents stepped out in Windsor, England, on Friday for the royal wedding of their granddaughter, Prince Eugenie, and her fiance, Jack Brooksbank. Meanwhile Prince Philip wore grey trousers, a black jacket and a tan vest.
London-based cake designer Sophie Cabot, 33, was chosen to make the cake for Eugenie, who is the younger daughter of Queen Elizabeth's second son, Prince Andrew the Duke of York, and his former wife, flame-haired Sarah Ferguson.
This time it is Prince Harry's cousin, Princess Eugenie, 28, who will walk down the aisle to tie the knot with fiancé Jack Brooksbank.
And similar to Harry and Meghan, Eugenie and her fiancé will invite 1,200 members of the public to the castle grounds for a better view of Friday's festivities.
Camera IconNaomi Campbell arrives at St. George's Chapel.Picture: Getty Images.
Unlike other royal weddings, the day will not be broadcast on BBC, with ITV's This Morning instead taking over the coverage.
Maid of honour Princess Beatrice - Eugenie's older sister - will read an extract from F Scott Fitzgerald's classic novel The Great Gatsby.
Thousands of well-wishers are also expected to line the streets of Windsor to cheer the newly-married couple as they drive past in a carriage procession at 12pm BST. "They both want a big family, at least three kids", the source explains, adding that Meghan is "starting to feel more settled" in her new life as a person who's super fancy.
Princess Eugenie's Royal Wedding carriage procession route REVEALED by Duke of York
A Gaelic Blessing will be sung by the choir, and Italian singer-songwriter Andrea Bocelli will perform Bach's Ave Maria. Trevor and Meghan tied the knot in lavish beach wedding in Ochio Rios, Jamaica in 2011 after dating for seven years.
The ceremony will take place at the castle's 15th Century St George's Chapel with the Dean of Windsor David Conner officiating.
Her fiancé, Jack Brooksbank, is a drinks executive and the United Kingdom ambassador for Casamigos Tequilla, a brand co-created in 2013 by George Clooney.
"This is meant to be a family wedding", Eugenie's father Andrew said earlier.
Singer Robbie Williams was also there, with his six-year-old daughter Theodora part of the bridal party, as well as fellow musicians Ellie Goulding and Ricky Martin.
The bride-to-be has enlisted the services of fiancee Jack Brooksbank's tequila brand to create some bespoke drinks for their wedding weekend.
Eugenie is following tradition by not revealing who designed her wedding gown, but she has said it will be a British designer.
The queen will host a champagne luncheon for the newlyweds shortly after the ceremony.
Eugenie has worked for several years in a fulltime position with the Hauser and Wirth art gallery in London.