You might not have heard, but there's yet another royal wedding taking place.
After arriving to the chapel, the 37-year-old found her seat amongst the Royal Family, including the Duchess of Cambridge, who also turned to her wedding dress designer, Alexander McQueen, to create a memorable look for her cousin-in-law's special day.
Eugenie's elder sister Princess Beatrice, the maid of honour, read a passage from the The Great Gatsby describing the smile of the title character, a rich man famed for throwing parties for the 1920s NY glitterati.
But the selection - delivered by Eugenie's older sister Princess Beatrice - sparked derision among those who say it shows the couple have completely missed the point of the book.
Eugenie will not take her new husband's title as he does not have one.
For this occasion, she opted to wear a modest dark blue sapphire-colored coat and dress by Givenchy, the same label behind her own wedding dress.
It includes a number of symbols that are meaningful to Princess Eugenie as motifs, including a Thistle for Scotland, The Shamrock for Ireland, The York Rose for England and The Ivy representing the couple's home.
Princess Eugenie married Jack Brooksbank at St George's Chapel in Windsor Castle today, on Friday 12 October. It's not known how she knows the bride, who wore a spectacular gown by Peter Pilotto and Christopher De Vos and borrowed the Queen's dazzling Greville Emerald Kokoshnik tiara.
Robbie Williams and Ayda Field arrive.
Queen Elizabeth's granddaughter Princess Eugenie married wine merchant Jack Brooksbank at Windsor Castle today in front of celebrities and Britain's senior royals including Prince Harry and wife Meghan who Wednesday at the same venue in May. The pair met on a skiing vacation in Switzerland in seven years ago, and Brooksbank proposed in January when the pair were in Nicaragua.
"One particular passage in which Jay Gatsby is described reminded her immediately of Jack", Conner said.
Security around Windsor was tight, with airport-style security checks and large numbers of police. The royal family attended wearing stunning monochromatic looks in rich jewel tones - namely, ruby, sapphire, and emerald colored dresses.
A royal insider insisted Camilla's absence was not meant as a snub, telling the Mail: "She is fond of Eugenie and her sister Beatrice, and is very disappointed that she can not be there".