Her parents divorced when Eugenie was six, but the family of four has remained a tight unit.
Princess Eugenie, William and Harry's cousin, is getting married tomorrow to her fiance Jack Brooksbank in the United Kingdom, in fact, right in the same place where Harry's wedding was just a few months ago.
Jack admitted he had noticed Eugenie first, with the couple "staring" at each other after being instantly infatuated.
Members of the Royal Family are expected to begin arriving at Windsor Castle's Galilee Porch at about 10:25 BST, with the ceremony starting at 11:00.
As the second daughter of the third child of the monarch, Eugenie's wedding is not, arguably, the most significant national event to take place this year.
This is where the Princess and her husband will go before they return to the castle.
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The wedding will feature music by singer Andrea Bocelli and the Royal Philharmonic Orchestra, while guests at the reception will enjoy a cake by London-based cake-maker Sophie Cabot.
It also could just be a color that Princess Eugenie likes, as she's worn various versions of red over the years.
The wedding will also be streamed live on the internet for people across the world to enjoy.
Meghan and Harry obviously have a busy few months ahead. Queen Elizabeth's other great-grandchildren Savannah Phillips, 7, Isla Phillips, 6, and Mia Tindall, 4, will also be bridesmaids.
The policing costs will have been increased by the 1km carriage ride the couple will make through the town after the ceremony.
Criticism has already been levied at the estimated £2 million security bill, which falls to the taxpayer, for Eugenie's wedding.
The couple, who met in the Swiss ski resort of Verbier in 2010 and got engaged in Nicaragua in January, have likewise invited 1,200 people from across Britain to join in the celebrations in the castle grounds and to watch the newlyweds leave St George's Chapel after the service.