Her signature style has historically been black or boldly colored—with the cut of the clothes most important. Her main concern has always been proportions, curves and necklines.[2] Her designs are known to be sexy, yet classic.[3] She is a self-identified fabric junkie credited with popularizing many futuristic fabrics. Her styles range from body-conscious cocktail dresses, to wedding attire, to lounge wear, but she is best known for her form-flattering dresses.[4]

Miller draws inspiration from a wide range of influences including cinema, contemporary art, mid-20th century cinema, contemporary art, mid-20th century architecture and exotic cultures.[