Popsugar Popsugar Harry Potter Easy Cosplay Costumes: Princess Leia October 21, 2016 by Ann-Marie Alcántara What you need: A white dress or long white shirt, a prop, and two buns on either side of your head. Harry PotterHalloweenAdventure TimeHalloween CostumesWonder WomanPokémonDIY Halloween CostumesStar WarsMarvelHalloween Costumes 2020