Meghan Markle, 36, and Prince Harry, 33, have been dating for over a year with bets being taken on the couple getting engaged shortly.
Meghan has a keen interest in fashion, having previously worked with a fashion label on her own line.
A wedding to royalty will guarantee images of Meghan’s wedding dress will be beamed around the world – so what kind of dress will she choose?
Kate Middleton chose a design heavily influenced by another royal bride, Grace Kelly, for her wedding to Prince William in 2011. Could Meghan go down the same route and use a royal bride as her wedding dress reference point?
Queen Elizabeth II
The head of the British Royal Family wed the Duke of Edinburgh, Prince Philip, in 1947.
She wore a dress designed by Norman Hartnell for the day, which featured a long train and heavily detailed floral lace design.
The couture house sadly closed in 1992, so Meghan will not be able to wear the same brand, but she could certainly pick out details from the gown to copy.
Princess Margaret
The Queen’s sister, Princess Margaret, wed Antony Armstrong-Jones in 1960. She also chose a design by Norman Hartnell, although hers was less fussy than Queen Elizabeth’s.
It was made from silk organza with 30 metres of fabric in the skirt alone. The silhouette was very modern, and is still worn by brides today.
Queen Fabiola of Belgium
Meghan may decide to choose a dress similar to one worn by a lesser known royal for her big day, and she would be wise to consider the gown chosen by Queen Fabiola of Belgium to wed King Baudouin in 1960.
The dress was designed by Cristóbal Balenciaga, who is now deceased – but his label lives on and is still famed for its gowns.
The dress, made of silk, tulle and trimmed with fur, featured a high neckline and three-quarter length sleeves.
Princess Marie-Chantal of Greece
As a proud Californian, Meghan tends to dress in a more relaxed, casual style. meghan maThis pretty Valentino dress, worn by Princess Marie-Chantal of Greece to Pavlos, Crown Prince of Greece on her wedding day in 1995, could cater to Meghan’s tastes.
The pearl-encrusted ivory silk dress had a tulip-shaped front and 4.5m Chantilly lace train. It reportedly cost $225,000 (£170,000) and took four months, 12 different kinds of lace and 25 people to make it.
Valentino himself has retired, but the label still dresses some of the most stylish women in the world.