One of my favorite things about this gown is that although the top layer is loose and flowy, the very fitted underdress showing through the sheer layer keeps it from looking too tent-like. If I had to guess I would say that the movie gown’s underdress (seen clearly above) is tight-fitting satin with some extra fullness below the knee to allow for movement. Since I don’t have Audrey Hepburn’s stick-thin figure and have no intention of spending an evening in a dress so tight I can’t move freely, I’ve decided to go in a different direction and use a bias-cut underdress.