Princess Eugenie, 28, is marrying her long-term partner Jack Brooksbank this Friday.
The couple are saying “I do” in St George’s Chapel, Windsor Castle, with the event set to be packed with royals and A-list celebrities.
With so many influential and famous people guests on the big day, what outfits will be paraded is a huge talking point.
Betting agency Ladbrokes has now released the odds on what some members of the Royal Family will be wearing, including the Queen.
According to the odds, Her Majesty is expected to look “pretty in pink” for the wedding of her granddaughter.
The odds are 5/1 that the Queen will wear pink, but there’s also a 3/1 chance that she opts for a blue number.
Orange is the next likely colour the Monarch is expected to wear, betting at 4/1, with purple coming in at 5/1.
For the Royal Wedding of Meghan Markle and Prince Harry back in May, the Queen opted for a lime green ensemble.
She matched the bright coat with a lime green hat, finished with a striking purple floral design.
The odds on the Queen wearing green to Eugenie’s wedding, however, are 6/1.
For the wedding of her other grandson, Prince William to Kate Middleton in 2011, the Queen opted for lemon yellow.
Yellow also scored low with betters, attracting the same odds of 6/1.
Talking about the odds, Jessica Bridge of Ladbrokes said: “It may well be Princess Eugenie’s big day, but she’ll also have to share the limelight with The Queen, Kate and Meghan, and attention is quickly turning to their outfit choices ahead of Friday’s spectacle.”
The odds on Kate Middleton will wear on the big day were also revealed.
Betters have the Duchess of Cambridge wearing Alexander McQueen at 1/2.
While odds have been revealed for what the guests are wearing, little is known about the bride herself’s outfit.
Appearing in a recent issue of British Vogue, Eugenie spilled a few details of her wedding, including the fact that she had found her wedding dress.
Talking in an interview with the publication, she said: “[The dress] is the one thing that I was really decisive about.
“As soon as we announced the wedding, I knew the designer, and the look, straight away.
“I never thought I’d be the one who knew exactly what I like, but I’ve been pretty on top of it.”