Popsugar Popsugar Harry Potter Easy Cosplay Costumes: Harry Potter October 21, 2016 by Ann-Marie Alcántara What you need: A black robe or cardigan, a white shirt, a red tie, and black round glasses. Harry PotterHalloweenAdventure TimeHalloween CostumesWonder WomanPokémonDIY Halloween CostumesStar WarsMarvelHalloween Costumes 2020