Princess Eugenie is expected to follow tradition by including a floral good luck charm in her wedding bouquet.
Custom dictates that royal brides carry flowers containing a sprig of myrtle.
And not just any myrtle – the myrtle for royal bouquets comes from a bush grown from a posy originally given to Eugenie’s great-great-great-great-grandmother Queen Victoria.
The glossy, evergreen shrub is said to bring luck, prosperity and fidelity in marriage.
The Duchess of Cambridge, the Queen, Diana, Princess of Wales, and Eugenie’s mother the Duchess of York all had myrtle in their wedding bouquets, as did, more recently, the Duchess of Sussex.
When Eugenie’s mother, then Sarah Ferguson, married the Duke of York in July 1986, she wore an elaborate floral headdress containing her husband’s favourite flowers, fragrant gardenias.
Her bouquet was designed by society florist Jane Packer and was a small spray, with lilies and lily of the valley, arranged in an unusual “S” shape.
In another tradition, royal brides poignantly send their bouquet back to Westminster Abbey to be placed on the Grave of the Unknown Warrior.
Meghan followed the custom, as did Kate in 2011, the Queen, who was Princess Elizabeth when she wed, Diana in 1981, and the Duchess of York after her wedding.
The late Queen Mother began the long-standing tradition when her posy was left at the grave in 1923 after her wedding to the Duke of York, later George VI.
The flowers were placed in memory of her brother Fergus, who was killed in 1915 during the global conflict.
Convention dictates that the day following a royal wedding, the floral tribute is sent to the Abbey after the official wedding pictures of the bride and groom have been taken.
Kate’s bridal bouquet, which included sweet William, as well as myrtle, lily of the valley and hyacinth, was placed on a small pillow on the grave.
Diana’s oversized spray of flowers consisted of white and gold stephanotis, gardenias, orchids, lily of the valley and yellow Earl Mountbatten roses.
The Unknown Warrior’s body was brought from France and buried on Armistice Day, November 11 1920.
It is thought the idea came from the Rev David Railton, who had served as a chaplain on the Western Front.
It is now one of the most visited war graves in the world.