Justice League & Justice League Unlimited Voice Cast
Kevin Conroy’s Batman can stop a room with a few words. Michael Rosenbaum’s Flash usually has a few too many. The voices are a huge part of why this League feels like a group of people who know—and occasionally drive each other crazy.
This guide covers the original English-language cast of Justice League (2001–2004) and Justice League Unlimited (2004–2006): the founding seven, selected recurring heroes, and some of their most memorable opponents. It is a character reference, rather than an exhaustive list of every guest or incidental voice.
Who voices the original seven?
The seven main actors below carry their roles from Justice League into Unlimited. The roster grows, but the voices at the center of the team stay familiar.
| Character | Voice actor |
|---|---|
| Batman / Bruce Wayne | Kevin Conroy |
| Superman / Clark Kent | George Newbern |
| Wonder Woman / Diana | Susan Eisenberg |
| Green Lantern / John Stewart | Phil LaMarr |
| The Flash / Wally West | Michael Rosenbaum |
| Hawkgirl / Shayera Hol | Maria Canals-Barrera (credited as Maria Canals) |
| Martian Manhunter / J’onn J’onzz | Carl Lumbly |
Conroy gives Batman a dry, economical delivery; Newbern’s Superman can sound reassuring one moment and deeply frustrated the next. Eisenberg brings conviction to Diana, while LaMarr’s John Stewart rarely sounds as if he has time for nonsense. Rosenbaum is often the person supplying that nonsense.
Canals-Barrera lets Shayera’s bluntness coexist with vulnerability. Lumbly gives J’onn a gentleness that makes his place among these much noisier personalities especially appealing. Those contrasts are a big part of the team’s chemistry.
Hawkgirl / Shayera Hol
Maria Canals-Barrera
The credits list her as Maria Canals. Both names refer to the same performer. Our Hawkgirl feature explores the character’s difficult place in the team; it contains story spoilers.
The expanded Justice League Unlimited cast
JLU has room for heroes who do not always agree with the founding team. Green Arrow questions the organization, the Question questions practically everything, and Black Canary has no trouble standing her ground.
| Character | Voice actor | Series covered here |
|---|---|---|
| Aquaman | Scott Rummell | Justice League and JLU |
| Black Canary | Morena Baccarin | JLU |
| Booster Gold | Tom Everett Scott | JLU |
| Green Arrow | Kin Shriner | JLU |
| Huntress | Amy Acker | JLU |
| Supergirl | Nicholle Tom | JLU |
| The Question | Jeffrey Combs | JLU |
| Vixen | Gina Torres | JLU |
Green Arrow
Kin Shriner
Shriner’s Oliver Queen sounds comfortable challenging a room full of stronger heroes. The skepticism gives the League someone worth listening to when the organization gets too pleased with itself.
Black Canary
Morena Baccarin
Baccarin balances Dinah’s confidence with concern for the people close to her. For a closer look at those relationships, read our Black Canary feature (spoilers).
The Question
Jeffrey Combs
Combs makes the detective’s suspicions sound both absurd and unnervingly plausible. That balance is the fun: you can laugh at his certainty and still want to hear what he has found. Read more about the Question.
Aquaman
Scott Rummell
Rummell voices Aquaman in both League shows. His forceful delivery suits a king who does not consider the surface world entitled to his cooperation.
Amy Acker’s Huntress brings a sharper edge to the expanded team. Gina Torres gives Vixen an assured presence, while Nicholle Tom’s Supergirl has a restless energy of her own. Tom Everett Scott’s Booster Gold supplies a very different kind of confidence: the sort that would really like somebody to notice.
Villains and the people who challenge the League
A convincing League needs voices that can push back. Clancy Brown’s Luthor and Michael Ironside’s Darkseid do that in very different ways: one likes to make his case, while the other sounds as if the argument is already over.
| Character | Voice actor | Series covered here |
|---|---|---|
| Amanda Waller | CCH Pounder | JLU |
| Darkseid | Michael Ironside | Justice League and JLU |
| Gorilla Grodd | Powers Boothe | Justice League and JLU |
| The Joker | Mark Hamill | Justice League |
| Lex Luthor | Clancy Brown | Justice League and JLU |
| Roulette | Virginia Madsen | JLU |
Roulette
Virginia Madsen
Madsen’s controlled delivery fits a promoter who treats other people’s danger as entertainment. Roulette belongs to JLU’s smaller, nastier corners, where a threat does not need to end the world to matter.
Amanda Waller deserves a distinction here. She opposes the League, but putting her in the same moral category as Darkseid misses what makes her interesting. CCH Pounder gives Waller the authority to make even Superman listen. Our Cadmus watch-order guide follows the conflict.
Casting details that are easy to mix up
George Newbern or Tim Daly as Superman?
George Newbern is the main adult Superman voice in both League series. Tim Daly voiced the adult Superman in the earlier Superman: The Animated Series. The change happens between shows, rather than when Justice League becomes Unlimited. DC’s Tim Daly retrospective covers his connection to the earlier series.
Maria Canals and Maria Canals-Barrera
These are two credited names for the same actor, not a Hawkgirl recasting. You will see Maria Canals in the League credits and Maria Canals-Barrera in newer cast listings.
Which Flash and Green Lantern are these?
The founding Flash is Wally West, voiced by Michael Rosenbaum. The founding Green Lantern is John Stewart, voiced by Phil LaMarr. Other people use those superhero names in DC stories, so an actor credited as “Flash” or “Green Lantern” in another production is not automatically this version.
The voice director matters, too
Andrea Romano handled voice direction and casting. The performances have to work together as an ensemble, not simply sound impressive in isolation. The arguments, teasing and changes of tone are as important to this team as the battle cries.
Find the episodes behind the voices
Start with our 52-episode Justice League guide, then continue with the 39-episode JLU watch order. For more on the team itself, browse the character features. Collectors can also explore the animated comics checklist and JLU action-figure checklist.
Cast sources
The references below support the actor–character matches. The performance observations are our own. This guide focuses on the original English tracks; international dubs and other DC productions have different casts.
- Apple TV: Justice League cast and crew — the founding seven.
- The World’s Finest: JLU cast and crew — returning leads and Andrea Romano’s credits.
- Justice League Unlimited cast reference — supporting and antagonist roles, cross-checked against the character and episode references below.
- The World’s Finest: the Question, Vixen, Booster Gold, Lex Luthor and Grodd.
- The World’s Finest: Aquaman and Mera; Justice League cast credits for the original series’ guest roles.
Character images © DC / Warner Bros. Cast reference checked October 8, 2026.