When a wedding invitation requests “black tie” attire, guests are expected to dress to impress. Often this translates into luxurious floor-length gowns in rich fabrics like satin, silk, chiffon, and lace. While this may seem over-the-top for some, it’s your chance to look like a full-blown celebrity, about to walk a red carpet. But while many of us likely have cocktail dresses knocking around our closets, it’s rarer to find a ball gown just waiting to be dusted off for your next black tie event. Not to worry: We’ve scoured the internet for floor-sweeping gowns from R29 reader-favorite retailers like Nordstrom, Bloomingdale’s, Shopbop, and more to help find a black tie dress fit for the lavish affair.