Will Arnett

Batman / Bruce Wayne (voice)

Michael Cera

Robin / Dick Grayson (voice)

Rosario Dawson

Batgirl / Barbara Gordon (voice)

Ralph Fiennes

Alfred Pennyworth (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

Sauron (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 / Medusa / Additional Voices (voice)

David Burrows

Anchorman Phil (voice)

Laura Kightlinger

Reporter Pippa (voice)

Brent Musburger

Reporter #1 (voice)

Ralph Garman

Reporter #2 (voice)

Chris Hardwick

Reporter #3 (voice)

Chris McKay

Pilot Bill / Additional Voices (voice)

Susan Bennett

'Puter (voice)

Charlie Bean

Additional Voices (voice)