However, it's worth noting Prince Philip's name also did not appear with the Queen's name in the Order of Service for Prince Harry's nuptials, which he did attend.
The venue is where Harry, younger son of heir-to-the-throne Prince Charles, Wednesday US actress Meghan Markle at a glittering ceremony in May and Eugenie is copying some of her cousin's plans for her big day.
The couple and family members the Duchess of York, Princess Beatrice and Prince Andrew were photographed making their way down the long walk at Windsor Castle, reportedly headed to a rehearsal at St George's Chapel ahead of their Friday (Oct. 12) wedding.
Princess Beatrice will be her sister's maid of honour.
The traditional "to obey" has been taken out.
The little royals are no strangers to these roles.
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While the rest of the Royal Family will be enjoying the festivities at Windsor Castle, Camilla is understood to have not wanted to let the children down. Peter is Princess Anne's son and has been referred to as Queen Elizabeth II's favorite grandchild.
Afterward, the newlyweds plan a carriage ride through the streets of Windsor to give the public a chance to see them up close.
The group says Eugenie does not carry out royal duties and that weddings are personal, private occasions, not affairs of state.
It has already been announced that 1,200 members of the public have been invited into the grounds of Windsor Castle for the wedding.
The stressed-out bride is not only said to have attacked poor Kate by insisting she was forbidden from arriving through the main entrance, but Eugenie's diva demands, fights with the wedding planners and blow out budget mean the event is swiftly turning into a disaster. In the evening, guests will celebrate at a smaller evening reception at Royal Lodge, the York family home.