Cast list off Wikipedia: Margot Robbie as Harleen Quinzel / Harley Quinn: A former-certified psychiatrist, who became a crazed criminal and the Joker's accomplice/girlfriend, and later a part of the Suicide Squad. She has since cut ties with the Joker after the pair broke up.[8] Screenwriter Christina Hodson sought to reinvent Harley, wanting to expand on the character following her departure from the Joker's company.[9] Hodson called Harley the character she enjoyed developing most due to her unpredictable personality.[10] Mary Elizabeth Winstead as Helena Bertinelli / The Huntress: A vigilante who is the orphaned daughter of gangster Franco Bertinelli. Ella Mika portrays a young Helena, during flashback scenes. Jurnee Smollett-Bell as Dinah Lance / Black Canary A vigilante with the metahuman ability of hypersonic screams, which she inherited genetically from her mother. She is a singer in a club that Sionis owns. Smollett-Bell described Dinah as "disenfranchised