Rumoured to be attending so far are Hollywood names such as George Clooney, whom groom Jack Brooksbank works under at the actor's tequila firm Casamigos, Robbie Williams, whose daughter is expected to be flower girl for the occasion, not to mention royal couple du jour the Duke and Duchess of Sussex.
However while the royal family is expected to be out in force to support the ninth in line to the British throne to tie the knot, one member of the House of Windsor reportedly won't be making the occasion.
Camilla, Duchess of Cornwall, is understood to be missing the happy day due to a prior commitment.
Camilla's husband, uncle of the bride Prince Charles, is expected to attend the wedding solo, while his wife heads to an appointment in a school in Scotland, Hello! reports.
Royal commentator Victoria Arbiter said there was no bad blood, tweeting: "Royals don't like to disappoint. Given she'd already committed to attending a school event it's duty first."
The couple will exchange vows on Friday, 12th October, in St George's Chapel at Windsor Castle - the same spot Prince Harry and Meghan Markle said 'I do' in May this year.
Plans for the big day are emerging as the ceremony draws ever closer, with reports that Andrea Bocelli is being flown in to perform two songs during the ceremony, while the Royal Philharmonic will perform other music on the day.
They will take a carriage ride around the area after, greeting royal fans as they celebrate their first few hours as newlyweds.
Dessert lovers are told to 'expect rich colours of autumn' for the very moder wedding cake, which will be made by London-based cake designer Sophie Cabot using red velvet and chocolate and will be hand painted and decorated in detailed ivory sugar work.
The wedding will be screened live during a special broadcast of This Morning on ITV, after the BBC - who carried the wedding of the Duke and Duchess of Sussex in May - reportedly turned down the honour.
The Dean of Windsor, David Conner, will marry the couple while the Archbishop of York, John Sentamu, will lead the prayers. It has been reported that 800 guests will be at the wedding service.
Eugenie has revealed that she has chosen a 'British-based' designer for her wedding dress, with experts tipping Erdem as the one-to-watch.
The royal also revealed that she will be having a 'plastic-free' day, while the wedding has been given the hashtag #royalwedding2 for fans to follow on social media.
"It’s very nerve-wracking because you want it to be perfect but then you realise that you’re going to be with the person you love forever and nothing else really matters,” the bride-to-be said in a recent interview.
Buckingham Palace said they had received more than 100,000 applications from members of the public wanting to share in the couple’s big day however only 1,500 were chosen to witness the service in a similar fashion to that of Harry and Meghan's before.
Eugenie’s sister Princess Beatrice is likely to be the maid of honour and the Duke and Duchess of Cambridge’s children, Prince George and Princess Charlotte, are expected to be among the pageboys and bridesmaids.
The cost to the British taxpayer of the royal nuptials has been criticised by Republic, a campaigning group working for an elected head of state.
Republic claims estimates have put the security costs alone at £2 million for the event.