What do you get when you mix Hollywood royalty with actual royalty at a wedding? 

Some pretty amazing outfits.

Perhaps not surprisingly, Amal Clooney was one of the standouts at Prince Harry and Meghan's wedding on Saturday, sporting a bold yellow Stella McCartney dress that was undeniably regal. 

Oprah Winfrey was also praised for her Stella McCartney dress and matching statement hat, and Meghan's Suits co-stars certainly pulled out all the fashion stops.

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Amal Clooney, Serena Williams and Kitty Spencer all nailed their royal wedding looks.

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Other highlights included Diana's 27-year-old niece, Lady Kitty Spencer, in an emerald green Dolce & Gabbana dress, complete with a chic Philip Treacy fascinator.

And even the Queen upped her game in a bright lime silk tweed coat and Angela Kelly hat.

Here's a look at our top 10 picks from the royal wedding:

AMAL CLOONEY

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Every eye was on Amal Clooney in this sunny Stella McCartney dress. Pure perfection. And George scrubs up pretty good, too.

OPRAH WINFREY​

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Another Stella McCartney winner, this time on none other than Oprah Winfrey.

SERENA WILLIAMS

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Serena Williams, with husband Alexis Ohanian, showed off her curves in a chic Versace dress.

SARAH RAFFERTY

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We're loving the statement sleeves on Sarah Rafferty's Lanvin dress.

PRIYANKA CHOPRA

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A Vivienne Westwood suit was the perfect pick for actress Priyanka Chopra (and we're loving the heels). Abigail Spencer, left, is equally chic in a sweet polka-dot style by Alessandra Rich.

GINA TORRES

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While we're not totally sold on the hat, there's no denying that this red lace design looks lovely on Meghan's Suits co-star Gina Torres.

DAVID AND VICTORIA BECKHAM

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We reckon Becks looked awfully dapper in his dark grey suit. Unfortunately, Posh got slammed on social media for wearing a 'funeral dress' to a wedding.

LADY KITTY SPENCER

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Hollywood stars weren't the only ones to make the best-dressed list. Diana's niece, Lady Kitty Spencer, right, knocked it out of the park with this gorgeous Dolce & Gabbana dress.

DORIA RAGLAND

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The mother of the bride, Doria Ragland, looked elegant in this Oscar de la Renta outfit.

QUEEN ELIZABETH

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And last but not least, the Queen stood out (in a good way) in a lime coloured silk tweed coat and floral dress by Stewart Parvin. If only we could get her to ditch the bag...

- Stuff, with AP