Harley's costume evolution reflects her journey from Joker's sidekick to reclaiming her ... "roller derby" style attire or the more casual hot pants and t-shirt ensemble she sports in the film ...

In back-to-back films, costume designer and three-time Oscar nominee Arianne Phillips designed the far-ranging wardrobes for Joker and Harley Quinn as a song-and-dance duo in “Joker: Folie à ...