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)