Princess Eugenie, 28, and Jack Brooksbank, 32, are getting married this October at St George’s Chapel, Windsor Castle.
The two met in Verbier, Switzerland, when Eugenie was just 19, and have been together ever since.
The pair’s engagement was announced in January this year, with Jack getting on one knee in the Central American country of Nicaragua.
With friends including socialites, pop stars, members of the art world and hollywood actors, who will make the final cut?
Speaking to the Express.co.uk Royal Expert James Brookes, of Royal Central Mr Brookes said: “It’s likely the guest list will be filled with London’s socialites, and feature a smattering of guests from the art world considering Eugenie’s work with Hauser & Wirth.”
One of the celebrities expected to attend is singer Ellie Goulding, who has even been tipped as a bridesmaid.
Spotted watching the Brooklyn Nets take on the New York Knicks at Madison Square Garden in New York City together, the pair are rumoured to be close friends.
Another former flame of Prince Harry’s set to attend Eugenie’s wedding is Cressida Bonas.
It was reported that Eugenie actually introduced the pair back in 2012, but seems there is no unfinished business between Harry and Cressida, as she attended his wedding to Meghan last month.
Having delayed their honeymoon to attend a host of royal engagements, Meghan and Harry will have to be careful with their timing to not risk missing the second royal wedding.
Cara Delevingne is another celebrity pal expected to attend the second royal wedding of the year. It is unclear how the two met, but Eugenie and Cara have been pictured hitting the town together numerous ties, even snapped holding hands.
Eugenie is also close friends with Richard Branson’s daughter Holly Branson, with the two being friends for years.
The 28-year-old attended Holly’ wedding to Fred Andrews in 2012, and it’s almost certain Eugenie will return the favour.
A host of Hollywood actors are also expected to attend the wedding, with both Eugenie and Jack having a host of A-lister friends.
As the UK brand ambassador for Casimigos Tequila, Jack is suspected to have invited the brand’s co-founders, George Clooney and Rande Gerber, to the nuptials. With George also having attended Meghan and Harry’s special day.
If the famous pair attend, it is more than likely they will come complete with their other halves Amal Clooney and supermodel Cindy Crawford.
Ashton Kutcher and Mila Kunis are also ones to watch out for on the day of the wedding, being close friends with Eugenie’s sister, Beatrice, 27. Given Beatrice and Eugenie’s closeness it’s suspected the Hollywood couple are also friends with Eugenie.
Despite recent news, David and Victoria Beckham are also expected to attend Eugenie’s wedding, having been invited to both the Sussexs and Cambridges nuptials. Eugenie also attended a tea party at Buckingham Palace for their daughter Harper’s sixth birthday.