At most weddings, people can't stop talking about the bride's dress. But at royal events, the hats and fascinators worn by guests can sometimes draw just as much fanfare — and these over-the-top accessories are proof.
Princess Beatrice wore a bit of an untraditional headpiece compared to the more elaborate fascinators she's donned in the past, but turned heads nonetheless.
Her sister, Eugenie, opted for a pillbox hat that gave us visions of Jackie O.
Amal stood out among the sea of blues with this goldenrod Stella McCartney fascinator, which perfectly matched her dress.
Meghan Markle's besties may be American, but they had no trouble dressing the British part.
Princess Diana's niece was the picture of sophistication in this emerald green fascinator by Philip Treacy.
Camilla had the internet buzzing about her elaborate, icey pink feathered Philip Treacy hat.
Accompanied by her husband, British singer James Blunt, Sophia Wellesley's cream fascinator perfectly accented her embroidered frock.
In case the fact that OPRAH was at the Royal Wedding wasn't apparent, her loud hat by Stella Mccartney made it clear.
Kate Middleton's younger sister donned an understated blush fascinator to match her silk floral dress by The Fold.
The Duchess of Cambridge's mom wore a stunning mint arrangement by Catherine Walker, the same label she wore at Will and Kate's wedding in 2011.
Lady Edwina Louise Grosvenor's pink disc fascinator stood out among the crowd.
Serena's was a clear indicator that she was feeling her look (and we were too!).
The wife of Prince Harry's friend and Argentinian polo player Nacho Figueras was the definition of class in a flat-brimmed hat.
Singer Joss Stone's white fascinator played up her fun floral look.
The Duchess of York arrived wearing a hat and veil designed by milliner Jess Collett.
The wife of actor Gabriel Macht perfectly accented her cutout dress with a matching cranberry headpiece.
Sophie, Countess of Wessex, looked perfectly royal in a robin egg blue feathered fascinator.
Despite , Princess Michael of Kent arrived in a conservative flat-brimmed hat accented with florals.
The Duchess of Cambridge wore a stunning Philip Treacy hat to accompany her dress by Alexander McQueen, the designer who created her iconic wedding dress in 2011.
Meghan's Suits co-star arrived in a fedora-like hat to accent her red and pink lace dress.
The Queen's Angela Kelly hat, made using the same lime silk tweed as her dress and topped with a purple sinamay, sent a clear message to the bride and groom.
The former Spice Girl's look was quite similar to her outfit at Will and Kate's wedding in 2011.
Price Harry's ex wore a feathered headpiece that added a subtle touch to her striped tea-length dress.
His other past relationship went with a more elaborate headpiece to accentuate her deep blue dress.
Princess Diana's sister-in-law topped her monochromatic look with a perfectly matching deep purple hat.