In a stunning creation by her frequent collaborator, Catherine Walker, she donned an icy, powder-blue, diaphanous tulle gown. The ensemble was elevated with a chic scarf skillfully tied behind her, cascading gracefully like a train. Princess Diana also opted for flat baby blue shoes, aquamarine and diamond chandelier earrings, and a coordinating bracelet to complete her elegant accessories. She wore it at the Cannes film festival in the year 1987 as the walked the red carpet alongside her husband Prince Charles