MILLY Stephanie Dress in Black. - size 4 (also in ) MILLY Stephanie Dress in Black. - size 4 (also in ) Poly blend. Dry clean only. Fully lined. Shoulder cut-outs. Back keyhole with button closure. Hidden back zipper closure. MILL-WD868. 203 CE 013684. The MILLY collection epitomizes bold, advanced contemporary fashion with a feminine edge. Designer and founder Michelle Smith transforms classics by merging American sportswear silhouettes with distinctive Parisian atelier techniques. Smiths eye for impeccable detail, use of luxurious, cutting-edge fabrics and precise tailoring have made MILLY a cult favorite across the globe.