Royal wedding arrivals: Victoria and David Beckham look fabulous on their way into Windsor Castle

They may not be British royalty by blood, but by most other standards...!

David and Victoria Beckham looked predictably fabulous at the royal wedding of Prince Harry and Meghan Markle on Saturday, striding into Windsor Castle both wearing dark ensembles: David wore a smart formal suit while Victoria paired a navy calf-length dress with red stilettos.

Victoria's sleek ensemble was certainly a contrast to the dozens of floral and pastel looks from other female guests on the sunny May morning.

David was even spotted snapping a selfie with a young fan as he made his way into the ceremony -- too cute!

Although the Beckhams are no doubt Hollywood A-listers, they were far from the only famous faces invited to watch the lovely couple tie the knot.

Oprah Winfrey, Serena Williams, George Clooney and James Corden were among the celebrity guests in attendance, as well as Meghan's "Suits" co-stars, who entered the ceremony together.

Take a look at all the celebrity guests in the gallery below: