In the Universal Pictures film, Kat is one-half of a mega-celebrity couple and engaged to Bastian, played by singer Maluma. The two plan to get married onstage and stream their nuptials around the world while performing the titular hit single. Since the wedding dress is a centrepiece of the story, it needed to be a showstopper. Plucked from the runway of Zuhair Murad’s bridal collection, the strapless Cinderella-esque rose-gold metallic gown consisted of nine layers constructed of silk taffeta, horsehair and tulle. The delicate combination of sparkling crystals, silver, ruffles, embroidery and lace “made it extremely heavy,” says Duncan.