David and Victoria Beckham have arrived at Windsor Castle, ahead of Meghan and Harry's wedding at midday.
Despite the sunshine, designer Victoria chose to wear a chic dark outfit.
Becks, meanwhile, chose a grey morning suit.
The couple had been expected to attend the event, although nothing had been confirmed ahead of their arrival.
They also attended the nuptials of Prince William and Kate in 2011, with Victoria, who was pregnant with daughter Harper at the time, opting for a dark outfit then, too.
George Clooney and wife Amal have also arrived at the venue, lending some classic Hollywood glamour to proceedings!
Stunning Amal towered over her husband, wearing a stunning yellow dress and matching hat.
Luther actor Idris Elba was among the first famous faces to arrive, delighting the crowds with a huge grin.
US megastar Oprah Winfrey is also in attendance.
Chloe Madeley entered the venue alongside her rugby player fiance, James Haskell.
Prince Harry's ex, Chelsy Davy, has also taken her place in the venue.
The Middletons arrived at the venue together, looking relaxed, doubtless thinking back to Pippa's big day when all the eyes of the world were on her!
Pregnant Pippa looked stunning in a mint green floral dress from The Fold.
Sir Elton John and husband David Furnish, close friends of the royal family, are also attending.
Musician Sir Elton has cancelled two of his Las Vegas shows this week so he can fly to the UK, according to reports.
US tennis champion Serena Williams, who is a close friend of Meghan, is reported to be another big name on the guest list.
Also rumoured to be attending the wedding in Windsor are the likes of musicians Ed Sheeran and Ellie Goulding, model Cara Delevingne and former Made In Chelsea star Millie Mackintosh.
Meanwhile, Meghan Markle’s former co-stars from the legal drama Suits came together for a dinner on the eve of the Royal Wedding.
Patrick J. Adams, who plays Meghan’s on-screen husband, posted a picture of cast members seated around a table at a restaurant near to Windsor, where the bride-to-be will marry Prince Harry on Saturday.
The 36-year-old Canadian actor captioned the image: "The last supper #royalwedding."
Other Suits stars at the table included Gina Torres, Sarah Rafferty and Rick Hoffman.
On Friday, the trio of actors appeared on NBC’s Today show to discuss the wedding.
Rafferty said: "We worked together for so many years on the show. It’s such an amazing experience.
"We were with each other for longer than we went to college or high school with our friends.
"We became family, in a way; we’re still family. So, this is a wonderful family affair."
Meghan played Rachel Zane, a paralegal-turned-attorney, for seven seasons in Suits before announcing her departure following her engagement to Prince Harry.