Matt Bomer as The Flash / Barry Allen (voice)

Jensen Ackles as Batman / Bruce Wayne (voice)

Darren Criss as Superman / Earth-2 Superman (voice)

Meg Donnelly as Supergirl / Harbinger (voice)

Stana Katic as Wonder Woman / Superwoman (voice)

Jimmi Simpson as Green Arrow (voice)

Zachary Quinto as Lex Luthor (voice)

Jonathan Adams as Monitor (voice)

Ike Amadi as J’onn J’onzz / Amazing Man / Ivo (voice)

Geoffrey Arend as Psycho Pirate / Hawkman (voice)

Zach Callison as Dick Grayson / Robin (voice)

Alexandra Daddario as Lois Lane (voice)

Alastair Duncan as Alfred (voice)

Ato Essandoh as Mr. Terrific (voice)

Cynthia Hamidi as Dawnstar (voice)

Aldis Hodge as John Stewart / Power Ring (voice)

Erika Ishii as Doctor Light / Dr. Hoshi / Huntress (voice)

David Kaye as The Question (voice)

Ashleigh LaThrop as Iris West (voice)

Matt Lanter as Blue Beetle / Ultraman (voice)

Liam McIntyre as Aquaman / Johnny Quick (voice)

Nolan North as Hal Jordan / Amazo / Homeless Man (voice)

Lou Diamond Phillips as The Spectre / Owlman (voice)

Keesha Sharp as Vixen (voice)

Harry Shum Jr. as Brainiac 5 (voice)