Steven Yeun and J.K. Simmons lead a star-studded voice cast on the Prime Video series.

See the A-list Invincible cast side-by-side with the characters they bring to life

Steven Yeun and J.K. Simmons lead a star-studded voice cast on the Prime Video series.

By Allison DeGrushe

Allison DeGrushe

Allison DeGrushe is a timely SEO writer at **. She has been working at * *since 2025. Her work has previously appeared on Distractify.

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March 16, 2026 6:11 p.m. ET

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Steven Yeun as Invincible and J.K. Simmons as Omni-Man on 'Invincible'. Credit:

Courtesy of Prime

- *Invincible *season 4 sees Steven Yeun's Mark face a danger that could change the world as we know it.

- Lee Pace, Danai Gurira, and Matthew Rhys are joining the cast.

- Season 4 premieres Wednesday, March 18.

*Invincible* has become one of the most acclaimed superhero series of the past few years, even landing on **'s list of the best sci-fi shows streaming on Prime Video.

"The series finds a strong balance between Mark's coming-of-age story and the superpowered world he inhabits, accented by flashes of violence that go beyond your traditional Saturday morning cartoon," according to EW's writer.

At the heart of *Invincible* is Mark Grayson (Steven Yeun), a half-human, half-Viltrumite trying to figure out what it really means to be a hero. His father, Omni-Man (J.K. Simmons), seems like the ultimate role model, but the show quickly proves that the superhero life is anything but clean-cut.

Packed with shocking twists, brutal battles, and morally gray choices, it constantly keeps viewers on their toes. With season 4 about to drop, let's dive into the *Invincible* cast and the characters.

Steven Yeun as Invincible

Steven Yeun in January 2026; Steven Yeun voices Mark Grayson/Invincible on 'Invincible'.

Arturo Holmes/WireImage; Courtesy of Prime

Steven Yeun made a huge mark as Glenn Rhee on *The Walking Dead* (2010–2016), a role that’s still what most people immediately think of when they hear his name. He's since earned an Oscar nomination for *Minari* (2020) and won Emmys for the first season of Netflix's *Beef* (2023). He's also done a ton of voice work, including *Voltron: Legendary Defender* (2016–2018).

Yeun voices Mark Grayson, the titular hero on *Invincible*, which landed on the streamer in 2021. The actor recently told GamesRadar+ that Mark is going through some tough times in season 4.

"Right now you're watching Mark as he's coming to understand maybe a little bit of the loss of his attachment to his idealism," Yeun said.

Sandra Oh as Debbie Grayson

Sandra Oh in December 2025; Sandra Oh voices Debbie Grayson on 'Invincible'.

Joe Scarnici/Getty; Courtesy of Prime

Sandra Oh was a standout on *Grey's Anatomy* (2005–2014) as Dr. Cristina Yang, a fan-favorite character that earned her a Golden Globe. Since then, she's taken on some big projects, including the hit series *Killing Eve* (2018–2022), Pixar's *Turning Red* (2022), and *Good Fortune* (2025).

These days, she voices Mark's mom, Debbie Grayson, on *Invincible*. Oh describes Debbie as a kind of "home front," a grounded, steady presence who represents the best of being human.

"I am glad that Debbie is in that human realm, because that's also what Debbie represents, which is the best of what it is to be human, to be a good parent," Oh told CBR.

J.K. Simmons as Omni-Man

J.K. Simmons in April 2025; J.K. Simmons as Omni-Man on 'Invincible'.

Michael Buckner/Variety via Getty; Courtesy of Prime

Oscar winner J.K. Simmons is one of those actors whose face (and voice) you just can't forget. With a career packed with standout roles — from *Oz* (1997–2003) and the* Spider-Man* trilogy (2002–2007) to *Whiplash* (2014), *The Accountant* (2016), and its 2025 sequel — he's everywhere. He's also huge in voice work, from the yellow M&M to roles on *BoJack Horseman* (2014–2020) and *Zootopia* (2016).

On *Invincible*, Simmons is the voice of Mark's dad, Nolan Grayson, a.k.a. Omni-Man, who's the planet's most powerful superhero.

Seth Rogen as Allen the Alien

Seth Rogen in February 2026; Seth Rogen voices Allen the Alien on 'Invincible'.

Taylor Hill/FilmMagic; Courtesy of Prime

Seth Rogen has been a comedy mainstay for years, starring in hits like *Superbad* (2007), *This Is the End *(2013), *Neighbors* (2014) and its 2016 sequel. He's also voiced characters in *Sausage Party*, *The Lion King*, and *The Super Mario Bros. Movie*, and became an even bigger star with his Emmy-winning Apple TV+ series *The Studio* (2025–present).

Here, Rogen voices Allen the Alien, Mark's one-eyed, loyal ally whose home world, Unopa, was destroyed.

Walton Goggins as Cecil Stedman

Walton Goggins in January 2026; Walton Goggins voices Cecil Stedman on 'Invincible'.

Stefanie Keenan/Getty; Courtesy of Prime

Walton Goggins has been a familiar face on TV for decades on shows from intense dramas like *The Shield *(2002–2008) and *Justified* (2010–2015) to dark comedies such as *The Righteous Gemstones *(2019–2025), *Fallout* (2024–present), and *The White Lotus* (2025). He has appeared in films including *Predators* (2010), *Lincoln* (2012), *Django Unchanged* (2012), *Tomb Raider* (2018), and *Ant-Man and the Wasp* (2018). Along the way, he even earned an Oscar for producing the short film *The Accountant* back in 2001.

On *Invincible*, Goggins is the voice of Cecil Stedman, the tough-as-nails head of the Global Defense Agency (GDA).

Gillian Jacobs as Atom Eve

Gillian Jacobs in January 2026; Gillian Jacobs voices Atom Eve on 'Invincible'.

Mat Hayward/Getty; Courtesy of Prime

Gillian Jacobs is probably best known for her hilarious turn as Britta on *Community *(2009–2015) and more recently as Tiffany on *The Bear *(2022–2025), She's also lent her voice to a bunch of shows, from *Robot Chicken* (2012) to *Monsters vs. Aliens *(2013–2014) and *American Dad!* (2014).

On *Invincible*, Jacobs voices Mark's girlfriend, Samantha (a.k.a. Atom Eve), a superhero figuring out her place in the world. She recently told GamesRadar+ that while Samantha once struggled with whether she wanted to be a hero, she'd found a way to use her powers through the company she started with Mark.

"But now, I think for the first time since she was a child, she's really having to grapple with like 'Who am I without these powers? What is happening?' And I think it's something that she's probably taken for granted. So, it's a real dilemma for her."

Zazie Beetz as Amber Justine Bennett

Zazie Beetz in February 2026; Zazie Beets voices Amber Justine Bennett on 'Invincible'.

Gerome Defrance/Getty; Courtesy of Prime

Zazie Beetz has been turning heads everywhere from *Atlanta* (2016–2022) to *Deadpool 2* (2018), and even as Arthur Fleck's (Joaquin Phoenix) neighbor in *Joker* (2019) and its 2024 follow-up. She's also lent her voice to *The Bad Guys* (2022) and its 2025 sequel, as well as on *Big Mouth *(2023).

Beetz plays Amber Justine Bennett, Mark's first girlfriend.

Jason Mantzoukas as Rex Splode

Jason Mantzoukas in December 2025; Jason Mantzoukas voices Rex Splode on 'Invincible'.

Chad Salvador/Variety via Getty; Courtesy of Prime

Jason Mantzoukas has made a career out of his high-energy comedic style, both on screen and in voice acting. Along with live-action roles on *Parks and Recreation *(2011–2015, 2020) and *Percy Jackson and the Olympians* (2023–2025), he's piled up voice credits on *Big Mouth*, *The Lego Batman Movie* (2017), *Ralph Breaks the Internet* (2018), and *Star Trek: Prodigy* (2021–2024).

On *Invincible*, Mantzoukas voices Rex Splode, the brash, outrageous superhero who eventually makes a heroic sacrifice in season 3. The actor previously spoke with Collider and shared what advice he'd give Rex: "I would tell him to go into therapy…. It's time to grow up, and it's time to be more empathic and more generous and kinder to people."

Grey DeLisle as Shrinking Rae

Grey DeLisle in December 2024; Grey DeLisle voices Shrinking Rae on 'Invincible'.

Rodin Eckenroth/Getty; Courtesy of Prime

Grey DeLisle is one of the most recognizable voices in animation, with a resume that stretches across decades of cartoons and video games. Fans have heard her in everything from *The Fairly OddParents *(2001–2017) to the *Scooby-Doo* franchise (2000–present), where she's long voiced Daphne.

On *Invincible*, DeLisle voices several characters: Shrinking Rae, Monster Girl, Betsy Wilkins, Thula, Olga, and Polly.

Zachary Quinto as Robot

Zachary Quinto in September 2025; Zachary Quinto voices Robot on 'Invincible'.

Todd Owyoung/NBC via Getty; Courtesy of Prime

Zachary Quinto has carved out a career balancing iconic roles and intense dramatic work, embodying Spock in the *Star Trek* reboot films (2009–2016), turning in haunting performances on *Heroes *(2006–2010) and *American Horror Story *(2011–2013, 2022–2023), and starring in medical drama *Brilliant Minds *(2024–present). His voice work is equally formidable, including playing Lex Luthor in multiple DC animated films.

Quinto voices Robot on *Invincible*, the strategic and technologically brilliant superhero who is the leader of the Guardians of the Globe.

Jeffrey Dean Morgan as Conquest

Jeffrey Dean Morgan in April 2025; Jeffrey Dean Morgan as Conquest on 'Invincible'.

Courtesy of Prime

Most of us will always remember Jeffrey Dean Morgan as the menacing Negan on *The Walking Dead*, who killed Yeun's Glenn (we're still mourning). But Morgan is more than one unforgettable villain. He slips effortlessly between intense antiheroes and magnetic leading roles, with credits ranging from roles on dramas like *Grey's Anatomy* (2006-2009) and *The Good Wife *(2015–2016) to sci-fi/fantasy fare including *Watchmen* (2009), *Supernatural* (2005-2019), and *The Boys *(2024–present), proving he brings the same raw energy to every character he plays.

On *Invincible*, Morgan brings Conquest to life, a battle-hardened Viltrumite who's been around for a long time.

In March 2025, co-showrunner Robert Kirkman told EW that Morgan's speech in the season 3 finale blew him away: "I hate gushing, but just the softness that comes out of his voice in that scene. You really get a genuine moment of emotion out of him, which...I don't know. Every time I watch the episode, it's so moving to me and it makes me love Conquest even more."

Lee Pace as Thragg

Lee Pace in November 2025; Lee Pace in Thragg on 'Invincible'.

Wiktor Szymanowicz/Anadolu via Getty; Courtesy of Prime

Lee Pace is known for completely immersing himself for every role, whether it's the epic worlds of *The Hobbit *trilogy (2012–2014) and *Guardians of the Galaxy *(2014), the sprawling saga of *Foundation *(2021), or the modern twists of *Bodies Bodies Bodies* (2022) and *The Running Man *(2025).

Pace joins *Invincible *season 4 as Thragg, the ruthless leader of the Viltrumites (and their most powerful member).

"As I was learning more about the story we were setting up, what I saw was a character with a lot of depth and a lot of different extremes. He goes through a lot," Pace told EW. "I don't want to say too much about that because we're just at the beginning of it, but I've also never done anything like this before. I've never done a voice-to-character like this."

Danai Gurira as Universa

Danai Gurira in September 2024; Danai Gurira as Universa on 'Invincible'.

Dominique Charriau/WireImage; Courtesy of Prime

Another *Walking Dead *alum is joining *Invincible*: Danai Gurira, who played Michonne on the zombie series and its 2024 spinoff, *The Walking Dead: The Ones Who Live*. She's also famous for bringing Okoye to life in Marvel's *Black Panther* films (2018, 2022), as well as *Avengers: Infinity War *(2018) and *Avengers: Endgame *(2019).

On *Invincible*, Gurira will voice Universa, a villainous alien wielding a powerful electric staff.

Matthew Rhys as Dinosaurus

Matthew Rhys in March 2026; Matthew Rhys as Dinosaurus on 'Invincible'.

Frazer Harrison/WireImage; Courtesy of Prime

Matthew Rhys recently earned a Golden Globe nod for his playing the unsettling Nile Jarvis on *The Beast in Me* (2025), but fans might also know him from *The Americans* (2013–2018), *A Beautiful Day in the Neighborhood *(2019), *Perry Mason* (2020–2023).

Now he's joining *Invincible* as Dinosaurus, a dinosauroid who can transform at will. His casting was revealed alongside the show's season 5 renewal.

Where can I watch Invincible?

*Invincible *is now streaming on Prime Video.

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