Looking for the best prom dresses under $100? You’ve come to the right place, babe. All of Birdy Grey’s floor-length prom gowns are $99, so you don’t have to spend a fortune to look gorgeous on prom night. Our affordable prom dresses are available in trendy colors such as burgundy, navy, mauve, blush pink, sage green, dusty blue, silver and more. Want a cutout prom dress? Try our Elsye Dress! Looking for a halter prom dress? Our Jules and Monica prom dresses are the perfect choice. We even offer convertible prom dresses, so you can choose how to style your prom gown, from a Grecian halter or strapless—take your pick! Make your prom dress for 2019 super special with our long prom dresses under $100. And guess what? Our long prom dresses can also be worn for other special occasions, such as high school or college semi-formals, homecoming and more. Your high school prom 2019 is going to be a night to remember in Birdy Grey’s beautiful floor-length prom gowns for under $100. Best prom ever!