Dwayne Johnson
Krypto the Superdog (voice)
Kevin Hart
Ace the Bat-Hound (voice)
John Krasinski
Clark Kent / Superman (voice)
Keanu Reeves
Bruce Wayne / Batman (voice)
Kate McKinnon
Lulu (voice)
Vanessa Bayer
PB (voice)
Natasha Lyonne
Merton (voice)
Diego Luna
Chip (voice)
Jameela Jamil
Diana Prince / Wonder Woman (voice)
Marc Maron
Lex Luthor (voice)
Dascha Polanco
Jessica Cruz / Green Lantern (voice)
Olivia Wilde
Lois Lane (voice)
Jemaine Clement
Arthur Curry / Aquaman (voice)
Daveed Diggs
Victor Stone / Cyborg (voice)
John Early
Barry Allen / The Flash (voice)
Ben Schwartz
Mark / Fire Guinea Pig (voice)
Thomas Middleditch
Keith / Ice Guinea Pig (voice)
Maya Erskine
Mercy Graves (voice)
Yvette Nicole Brown
Patty (voice)
Alfred Molina
Jor-El (voice)
Lena Headey
Lara (voice)
Keith David
Dog-El (voice)
Busy Philipps
Foofy Dog (voice)
Dan Fogler
Carl / Pilot / Racer (voice)
Winona Bradshaw
Whiskers (voice)
David Pressman
Corgi (voice)
Sam Levine
Waffles / Robot Guards (voice)
Jared Stern
Bathtub Guy / JLA Hotline (voice)
Michelle Morgan
Mech Suit (voice)
Amanda Ames
Guinea-Pigasus (voice)
Gavin McCrillis
Black Kitten (voice)