Dancing MachineRound off your spooky look with this Women's M3gan Costume Dress, and you'll be more than ready to recreate that infamous dance scene that fans of the movie can't stop talking about. M3gan Costume for Women | Scary Movie Costumes The adult M3gan costume has a 100% polyurethane filling for that perfect silhouette. M3gan's Haunting FashionFans of the chilling movie M3gan know the eerie allure of that robot doll all too well.