A favorite among street style It-girls and up-and-coming starlets worldwide, design duo Ostwald Helgason are taking the fashion world by storm with their colorful creations that manage to strike a balance between playful and undeniably chic. Founded by Susanne Ostwald and Ingvar Helgason, co-designers and couple of nine years, these London-based sartorial savants find inspiration from iconic art and literature.   After meeting while working for Marjan Pejoski—the subversive designer behind Bjork’s infamous swan dress—this stylish twosome launched their namesake label in 2012. Often seen on bloggers Leandra Medine, Susie Bubble, as well as A-listers Rooney Mara and Kiera Khightley, Ostwald Helgason are fashion’s must-watch—and must-wear—rising stars.