Kate Middleton just made a case for going the casual route at your own wedding — and she wasn't even trying. The duchess stepped out for day two of the Royal Ascot [1], looking light and cheery as ever in her Dolce & Gabbana design, which she wore to the queen's birthday concert [2] just one month ago. While she originally covered it up with a red Zara coat, this number clearly deserves the spotlight.

It gets a modest touch from the long-sleeved silhouette, but the design's sheer details and breezy skirt, which cuts off midshin, makes it trendy and a touch sexy. Of course Kate played to the elegant side, finishing her outfit with a Jane Taylor hat, neutral pumps, L.K. Bennett box clutch, pearl drop earrings, and her sapphire engagement ring. Read on for an all-angles view, then shop the look for Summer [3], or simply to ditch the floor-sweeping gown at your own nuptials.

Related:

• 60 Style Lessons Kate Middleton Taught Us That We'll Never Forget [4]
• The Real History Behind Kate Middleton's Royal Jewelry [5]
• The 27 Best Hats Kate Middleton's Ever Worn [6]

Shop Kate's Dress

Dolce & Gabbana Cotton-Blend Lace Dress [7] ($5,995)