Celebrities get ready for important events for weeks or even months. They think up their looks to the tiniest details, often putting a special meaning into their clothes and accessories. Meanwhile, fans and fashion experts keep guessing what message their famous idols wanted to convey with the help of this or that detail.

Rules are made to be broken!

Taffeta, silk, lace, sequins, and, of course, diamonds—let our archive of Princess Diana's party outfits inspire your fancy attire. See the looks here.

Beatrice Borromeo, who is married to Pierre Casiraghi, son of Princess Caroline and grandson of Princess Grace of Monaco, joined the royals at Monaco’s National Day celebrations wearing a red Dior Bar jacket, a hero piece from the house that dates back to 1947.

“The Princess of Wales is just IMPECCABLE! 😍♥️”

Beyond the explicit references to the Queen’s fashion—the headscarves, loafers, and ladylike handbags—there are other lasting ways in which Queen Elizabeth II, a passionate advocate for quality, helped to raise the bar for the making of our clothes. Vogue looks at the Queen’s quiet influence on British fashion.

From Prince Harry and Meghan Markle's Halloween disguises to the Princess of Wales as a roller disco queen, see the royals dressed up in costume