From royal weddings to A-list nuptials, look back on the past century's most iconic wedding photos.

From the couture designer wedding dress to the over-the-top décor and top-secret locations, celebrities knows how to get married right. And while they can be quite far-fetched (or even short-lived), an A-lister's big day remains etched in fans' brains for years to come.

Celebrity weddings have been closely followed for decades. Most recently, Kim Kardashian and Kanye West's Florence nuptials were as lavish as they come. Case in point: In lieu of place cards, guests' names were rumored to have been etched into a marble. Plus, who can forget Kim's now-iconic custom Givenchy gown? Also, George Clooney and Amal Alamuddin's wedding weekend was closely followed for a few reasons: Not only did a self-proclaimed eternal bachelor finally take the plunge, but also Amal's bridal wardrobe was just as captivating. And then, there are unions like Britney Spears and Kevin Federline and Pamela Anderson and Tommy Lee — these couples' crazy celebrations have remained in infamy for years even though their marriages quickly ended.

Of course, we can't forget about the royals either. From Kate Middleton's Alexander McQueen wedding dress to Grace Kelly's big-day ensemble, which has remained a pillar of bridal beauty for over 50 years, these are the moments define wedding-day trends for decades to come.

To stir up some serious nostalgia and wedding-envy, we went back decades to bring you the most memorable celebrity-wedding moments of all time. Sit back, relax, and re-live these incredible celebrity "I dos" (and wedding dresses!) from the past century.

From clockwise: E!; Getty Images; Corbis; Getty Images; Newscom; Getty Images

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