Vivian Ward's red dress, designed by Marilyn Vance and worn by Julia Roberts in "Pretty Woman," is one of the most glamorous in the 1990 Touchstone Pictures film. The diamond and ruby Iconic Dress: Julia Roberts' red dress in Pretty Woman (1990) The production studio slipped a note to Marilyn Vance during the costume creation process: Vivian's opera dress had to be black. Julia Roberts' iconic Pretty Woman costume that only cost $20 Woman & Home 35 Years Later, Pretty Woman Still Features the Most Iconic Movie Makeover Wardrobe Vogue