Victoria Beckham slips into slinky white dress for David Beckham’s 50th birthday party

So posh.

On Sunday, Victoria Beckham looked especially elegant in a slinky white slip dress for husband David Beckham’s star-studded 50th birthday bash, held at Cipriani Downtown Miami.

The fashion designer kept all the focus on the luxe silk gown, appearing to have ditched jewelry altogether, save for her sparkling diamond engagement ring.

“What a way to begin the first of many birthday celebrations for @davidbeckham, surrounded by friends and family x Kisses from Miami! 🇺🇸,” she wrote in an Instagram caption about her hubby, whose birthday is actually May 2.

“Keeping up with the Beckhams 🔥,” one person commented on the slideshow. Another added, “Modern British royalty. ❤️❤️”

The whole Beckham squad was at the soirée — including sons Romeo and Cruz and their respective girlfriends as well as daughter Harper — save for the couple’s eldest son, Brooklyn, 26, and wife Nicola Peltz, 30.

Romeo, 22, and Cruz, 20, were suited up in black tuxes for the black tie event, while 13-year-old Harper looked incredibly grown-up, coordinating with her mom in a slinky dark brown dress.

Romeo’s girlfriend Kim Turnbull, 23, arrived in a long pastel green slip dress, matching with Harper and Victoria.

Cruz’s girlfriend, Jackie Apostel, 29, meanwhile, opted for a light blue strapless gown with two layers of fringe on the neckline.

David took to Instagram to share images of the memorable evening, too. “So I thought I’d start celebrating slightly early , such a special night in Miami,” the former soccer player wrote.

“So lucky to have amazing friends and family to start the 50th celebrations with Love you @victoriabeckham @romeobeckham@cruzbeckham #HarperSeven”

In addition to his close-knit family, Beckham celebrated with famous friends — and fellow athletes — like Tom Brady, Shaquille O’Neal and Lionel Messi.

If this is just the kick-off ahead of May, we can’t wait for the main event.