Chris McKay Pilot Bill Director, Voice Will Arnett Batman, Bruce Wayne Voice Michael Cera Robin, Dick Grayson Voice Rosario Dawson Batgirl, Barbara Gordon Voice Ralph Fiennes Alfred Pennyworth Voice Siri 'Puter Voice Zach Galifianakis Joker Voice Jenny Slate Harley Quinn Voice Jason Mantzoukas Scarecrow Voice Conan O'Brien The Riddler Voice Doug Benson Bane Voice Billy Dee Williams Two-Face Voice Zoë Kravitz Catwoman Voice Kate Micucci Clayface Voice Riki Lindhome Poison Ivy Voice Suzy Eddie Izzard Voldemort Voice Seth Green King Kong Voice Jemaine Clement Suaron Voice Ellie Kemper Phyllis Voice Channing Tatum Superman Voice Jonah Hill Green Lantern Voice Adam DeVine The Flash Voice Héctor Elizondo Jim Gordon Voice Mariah Carey Mayor McCaskill Voice Lauren White Chief O'Hara Voice David Burrows Anchorman Phil Voice, Film Editing Laura Kightlinger Reporter Pippa Voice Brent Musburger Reporter No. 1 Voice Ralph Garman Reporter No. 2 Voice Chris Hardwick Reporter No. 3 Voice Todd Hansen Captain Dale Voice Seth Grahame-Smith Screenwriter Chris McKenna Screenwriter Erik Sommers Screenwriter Jared Stern Screenwriter John Whittington Screenwriter Dan Lin Producer Phil Lord Producer Christopher Miller Producer Roy Lee Producer Jill Wilfert Executive Producer Matthew Ashton Executive Producer Will Allegra Executive Producer Brad Lewis Executive Producer Zareh Nalbandian Executive Producer Steven Mnuchin Executive Producer Benjamin Melniker Executive Producer Michael E. Uslan Executive Producer Matt Villa Film Editing John Venzon Film Editing Lorne Balfe Original Music Grant Freckelton Production Design Kristen Anderson Set Decoration Vivienne To Art Director Mary Hidalgo Casting