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)