The Swedish royal family spent this past weekend celebrating King Carl XVI Gustaf's 70th birthday, and they wore very festive outfits [1]. But for the most formal event of all, a banquet at the Royal Palace, it was Crown Princess Mary of Denmark who invited the spotlight. Mary stunned in a floral cap-sleeve gown by Copenhagen designer YDE. Featuring a peplum frill and a yellow color scheme, it was complemented by a satin Saint Laurent clutch, Gianvito Rossi heels, a brooch of honor, and Charlotte Lynggaard jewels, including rings and drop earrings.

But the chicest addition of all was Mary's leaf-like Ole Lynggard headpiece, which was a casual twist to her look — one might have expected her to dazzle in a tiara. But of course, it's just like Princess Mary to surprise us, especially when it comes to fashion [2]. Read on to see her glow from all angles in such a Spring-appropriate party dress, then shop for a similar number to add to your wardrobe — but ditch the crown at your own risk.

Shop For a Yellow Dress Like Princess Mary's