Issa London — the label behind the sleek blue dress Kate Middleton famously wore when announcing her engagement to Prince William — specializes in ultra-feminine glamour. Founder and creative director Daniella Helayel infuses her elegantly draping clothing with the bright colors, nature-based motifs, and laid-back vibe that informed her childhood upbringing on the outskirts of Rio de Janeiro. Now based in London, Helayel has become a favorite among royals and celebs for her flowing maxi-dresses, sunny cotton mini-dresses, Warhol-print chiffon cape dresses and kaftans, and regal jackets and coats. With collections inspired by pop art, deep-sea fauna, Biblical tales, and other eclectic sources, Issa London makes clothing fit for a queen (or queen-to-be).