As one would expect, the stakes are high when it comes to mapping out a royal wedding guest outfit that would garner even Queen Elizabeth II's stamp of approval. Naturally, any old sundress from the back of your closet simply won't do, and A-list guests over the years have pulled out all the stops for their royal wedding day looks. From elaborate fascinators to bold (knee-length!) dresses and overcoats, guest apparel certainly proves that weddings of royal proportions ain't your standard nuptials (as if we didn't already know that...).
In honor of Princess Eugenie and Jack Brooksbank's October 12 royal wedding, we took a look at some of the best dressed guests of royal weddings past from around the world. The soon-to-be-married pair's dress code calls for men to wear morning coats, and for female guests to sport a day dress and hat. So, with just a few short days (!!!!) until Eugenie and Brooksbank walk down the aisle, perhaps you can garner some potential royal wedding outfit inspo from these previously worn looks, featuring appearances from Victoria Beckham to Nancy Reagan.
Prince Carl and Princess Sofia of Sweden
While attending the wedding of Prince Konstantin and Princess Deniz of Bavari (whose wedding look closely mirrored Meghan Markle's) in September, these Swedish royals truly looked like an IRL fairytale. We're getting major Cinderella vibes from Princess Sofia's baby blue gown, and her better half has the whole Prince Charming thing down in a black tux.
Also styled in custom Stella McCartney, Oprah Winfrey turned heads at Harry and Meghan's wedding in a light pink number—that came together literally hours before the wedding. After deciding that her original beige dress appeared too close to white, the designer's team stayed up all night to recreate her gown in a more wedding-friendly hue.
What would an Elton John ensemble be without a pair of quirky shades!? The "Piano Man" singer performed at the Duke and Duchess of Sussex's lunchtime wedding reception May 19.
David and Victoria Beckham
This isn't the only time you'll see this power couple make the list. Victoria donned one of her own creations to watch Harry and Meghan say "I do," which she paired with bright pumps. David, on the other hand, rocked a gray Dior Homme custom-made morning suit.
Princess Caroline of Hanover
The daughter of actress Grace Kelly and Prince Rainier III of Monaco, Princess Caroline almost outshone the bride at her son, Pierre Casiraghi's, wedding to Beatrice Borromeo in 2015. Contrasting colors and shimmery details make Caroline's look a completely enviable mother-of-the-groom gown.
Prior to their own nuptials, Beatrice Borromeo and Pierre Casiraghi attended Prince Felix Of Luxembourg and Claire Lademacher's wedding in 2013. Borromeo looked pretty in pink with a light, tailored pantsuit. And, can we talk about that one-of-a-kind headpiece!? Upcoming royal wedding guests, take note.
David and Victoria Beckham (...Again)
Posh Spice took her moniker to heart, wearing ever the fashion-foward look for Prince Willian and Kate Middleton's wedding in 2011. Sky-high heels topped off the former Spice Girl's all-navy look, which included a high-low dress with a royal wedding-appropriate hemline.
Princesses Eugenie and Beatrice
The future bride herself (left) and her sister, Princess Beatrice, both sported extravagant fascinators that matched their apparel to attend their cousin, Prince William's, nuptials. Eugenie stuck with a blue, green, and purple color palette, while Beatrice sported a light pink coat to complement her far-from-modest headpiece.
Even seven years after Will and Kate's nuptials, Pippa Middleton's bridesmaid dress is still a hot topic of conversation. The sister of the bride, who served as maid of honor, sported a fitted Sarah Burton for Alexander McQueen number that almost rivaled Kate's iconic long sleeve gown.
Fashion hotshot Karl Lagerfeld also attended Prince Albert II and Princess Charlene's 2011 nuptials, unsurprisingly taking the royal wedding dress code to trendy new heights. The creative director behind Chanel opted for studded gloves and a brooch to personalize his formal guest attire.
Princess Marie-Chantal Miller
If this royal bride's wedding dress has taught us anything, it's that this princess knows a thing or two about impeccable style. For Prince Nikolaos and Tatiana Blatnik's 2010 nuptials, Princess Marie-Chantal turned to a floor-length, trumpet-style pink gown. An embroidered shawl with floral appliqués topped off the Greece wedding look.
Queen Rania of Jordan
Channeling the ultimate Carolina Herrera vibes, Queen Rania wowed in a white blouse tucked into a lavender skirt as a guest at Crown Prince Felipe Of Spain and Letizia Ortiz Rocasolano's 2004 wedding.
The People's Princess was known for her iconic sense of style, which is apparent here in 1988, when she attended the wedding of Julia Rawlinson and James Ogilvy, son of Princess Alexandra of Kent. Diana's look reads classic and effortless, as she sports a white dress and hat, gray coat, and pearl accessories.
Queen Elizabeth I
The OG Queen Elizabeth donned a light blue look, complete with a fluffy headpiece (it was the '80s, after all) to the wedding of Princess Diana and Prince Charles.