08/04/2018 17:11 EDT | Updated 08/05/2018 11:26 EDT

Meghan Markle Celebrates Her Birthday In A Club Monaco Dress

The dress comes cheaper than the shoes.

This year marks the 37th birthday of MTV, Donkey Kong, Phil Collins' solo career, and — most importantly — Meghan Markle. Born Rachel Meghan Markle on Aug. 4, 1981 in Los Angeles, Saturday marks the Duchess of Sussex's first-ever birthday as a royal.

Meghan and husband Prince Harry spent the day attending the wedding of Harry's old friend Charlie van Straubenzee, who married Daisy Jenks in Surrey, just outside of London.

According to the U.K. tabloid The Mirror, well-wishers sang "Happy Birthday" as Meghan arrived.

And to no one's surprise, the Duchess of Sussex looked gorgeous.

They surely Compliment each other ❤️

A post shared by HRH Meghan Markle (@meghan_duchess) on

People magazine reports she wore a fascinator by milliner Philip Treacy, who has collaborated with Alexander McQueen and frequently designs extravagant hats and head pieces for Sarah Jessica Parker.

The black and white "My Fair Lady"-esque hat Meghan wore to the Royal Ascot last month was also designed by Treacy.

#meghanmarkle #buckinghampalace #duchessofsussex

A post shared by HRH Meghan Markle (@meghanmarkle8) on

Her shoes were by luxury brand Aquazzura, and her woven raffia clutch was by Kayu.

Duchess Meghan at a wedding today❤️❤️❤️ looking Lovely.

A post shared by HRH Meghan Markle (@meghan_duchess) on

Love their Love ❤️

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And Meghan made the refreshing choice of wearing a (relatively) affordable outfit: her pleated colour-block dress is from Club Monaco and retails for about CAD $425. (That's less than half the cost of her shoes!) The dress is somehow still available online, although it's sure to sell out soon.

The brand, of course, was thrilled: there's no better publicity for a fashion label than for the Duchess of Sussex to wear your clothing.