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/ Source: TODAY
By Ree Hines

As if watching royalty and witnessing history isn't enough, Saturday's big event at St. George's Chapel is shaping up to be a star-studded affair.

Among the earliest guests to arrive were celebrities from both sides of the pond, as well as other familiar faces, all set to see Prince Harry and Meghan Markle say their "I dos."

Oprah arrived in style.Ian West / AFP - Getty Images

We already knew that Markle's former "Suits" co-stars were on the list, but we had no idea about Oprah Winfrey and other A-listers.

The former talk-show titan, decked out in a blush day dress and wide-brimmed hat, was one of the notable names to show up, but she was far from alone.

George and Amal Clooney added their star power to the guest list.Gareth Fuller / pool via AP

Actors, activists, singers and more soon followed suit.

Couples George and Amal Clooney and David and Victoria Beckham showed up in their finery.

The Beckhams spicing up the royal wedding!Toby Melville / EPA

Big- and small-screen star Idris Elba and performer James Blunt were also there.

British actor Idris Elba is in attendance.Ian West / pool via AFP - Getty Images
You're looking beautiful, James ... it's true!Chris Radburn / AFP - Getty Images

Markle's "Suits" co-stars Gabriel Macht and Patrick J. Adams (her on-screen other half) were among her former castmates to make their way to Windsor.

Markle has the blessing of her former castmate Macht.Toby Melville / WPA pool via Getty Images
Sorry, Patrick ... she's with someone else now.Ian West / WPA pool via Getty Images

But the notable names, which also included Serena Williams, her husband Alexis Ohanian, Elton John and James Corden, weren't limited to entertainers.

Serena Williams and her husband, Alexis Ohanian, are taking part in the big day. Gareth Fuller / pool via Reuters
Any chance Corden will perform karaoke at the reception? Gareth Fuller / pool via Reuters
Elton was a close friend of the late Princess Diana.Danny Lawson / pool via Reuters

Prince Andrew's ex-wife, Sarah Ferguson, and family members of the former Kate Middleton also made an appearance, as did Harry's friend and ex, Chelsy Davy.

Sarah Ferguson waves to the crowd. Gareth Fuller / pool via AP
The Duchess of Cambridge's mother, Carole Middleton, arrives at St. George's Chapel.Gareth Fuller / pool via Reuters
Pippa Middleton and her husband, James Matthews, will watch Prince Harry and Meghan Markle say "I do."Odd Andersen / AFP - Getty Images
Chelsy Davy is all smiles.Chris Jackson / Getty Images

And these were only some of the stars who made an appearance!

For more on the big day, visit our royal wedding page.