1. Steven Yeun as Invincible

Rising to popularity after appearing in The Walking Dead, Steven Yeun has appeared in multiple movies and shows and has made a massive career for himself, bagging multiple awards. Steven Yeun will reappear as the protagonist of the TV series, Mark Grayson, or Invincible, in Season 4. The last time we saw Mark, he took a stand against Conquest and refused to surrender Earth to their empire. In Season 4 of Invincible, we will probably see Mark and his allies stand against the entire Viltrum Empire and ultimately, go toe to toe with none other than Thragg himself.

2. Sandra Oh as Debbie Grayson

Sandra Oh is known for her award-winning performance in Grey’s Anatomy, where she has proven herself to be a really talented actor. She takes up the role of Debbie Grayson. She is the mother of Mark and Omni-Man’s wife. Debbie was massively devastated by what Nolan did to their son in Season 1, and also degraded her by calling her a pet. However, in Invincible Season 4, Nolan has come back to Earth to recruit Mark and other heroes so the confrontation between Debbie and Nolan would be interesting to see.

3. J.K. Simmons as Omni-Man

J.K. Simmons has been one of the most hated superhero characters in the 2000s for his portrayal of J. Jonah Jameson, which he still does in Spider-Man movies. So, it is pretty obvious that he is no stranger to the genre. In the series, he appears as Nolan Grayson or Omni-Man, a Viltrumite and the most powerful man on Earth. However, even though initially he was thought to be a hero, as it turns out, his agenda is to take over the planet and expand the Viltrumite empire. By the end of Season 1, we see him almost kill his son Mark, but he couldn’t land the final blow and just left Earth. In Season 2, we see that he is extremely guilty of what he has done, and by the end of Season 2, he reveals that he misses his wife, and in Season 3, he finally goes against the Viltrum Empire and joins Allen in the fight against their tyranny. In the upcoming Season 4, the trailer tells us that he is now a member of the Coalition of Planets and has come back to Earth along with Allen to recruit Mark and other heroes in their fight against the Viltrum Empire.

4. Zazie Beetz as Amber Bennett

Zazie Beetz is a quite well-established actress who is known mainly for her role in Deadpool 2 as Domino. She takes up the role of Amber Bennett, the romantic interest of Mark Grayson, and eventually becomes his girlfriend. Even though their relationship worked out initially, Mark’s life as Invincible came between them, and they ended up breaking up with each other in season 2. Now, Mark is dating Ev,e but Amber is still present in the show as a side character. However, a lot of people thought that she would not appear in Season 4, but as it turns out, Amber is now confirmed to make an apperance.

5. Andrew Rannells as William Clockwell

You might not have seen Andrew Rannells a lot on screen, but he is indeed a veteran when it comes to voice acting, as he has given his voice to multiple anime dubs, the most popular being Forrest in Pokémon Chronicles (2006). He appears in Invincible as William Clockwell, Mark’s best friend and sometimes, his guy in the chair. He is one of the few people who know about Mark’s double life and is his best friend; he is certainly coming back in the next season.

6. Ben Schwartz as Shapesmith

Acclaimed voice actor Ben Schwartz is known for many major roles. He has given his voice to Sonic the Hedgehog and has also voiced Dewey in the DuckTales reboot. Ben also appeared in DC League of Super-Pets and the Rise of the Teenage Mutant Ninja Turtles. In Invincible, he appears as the Shapesmith, a shapeshifting Martian who assumes the identity of astronaut Rus Livingston, leaving him behind on Mars and taking his place. Eventually, his identity was revealed, and he became a member of the Guardians of the Globe after helping the team to rescue the real Rus Livingston from Mars.

7. Walton Goggins as Cecil Stedman

Walton Goggins is probably one of the finest actors Hollywood has ever produced. His fame met all its glory with Detective Shane Vendrell on The Shield. He has appeared in House of the 1000 Corpses, The Next Karate Kid, and The Joy Ride. Most recently, he once again took the world by storm with his stellar performance as The Ghoul in the live-action Fallout series. In Invincible, Goggins appears as Cecil, the director of GDA, aka the Global Defense Agency. He and his organization are responsible for looking after all superhero activities and working with them to protect Earth and its people. Initially, Omni-Man was their Ace of Spades, but since he turned rogue and left Earth, Cecil had to bring Mark up to the mark as a replacement for Omni-Man.

8. Chris Diamantopoulos as Donald Ferguson

Chris Diamantopoulos has not appeared on screen a lot, but has been the voice of Mickey Mouse in multiple projects. His on-screen performances includeThe Three Stooges, Red Notice, and a few more. He has also given his voice to Batman on certain projects. In Invincible, Chris takes up the role of Donald Ferguson. He is the second-in-command to Cecil and also somewhat of his assistant. By the end of season 1, Donald was killed by Omni-Man, but in season 2, we saw him back in action. It was later revealed that Donald has died multiple times, and every time he was reanimated using cybernetics to the extent that now most of him is just a machine.

9. Mark Hamill as Art Rosenbaum 

If I have to tell you who Mark Hamill is, my friend, you need to recalibrate your taste in the media you have been consuming. Embedded in the history of cinema as Luke Skywalker, Mark Hamill appears in Invincible as Art Rosenbaum. He used to be a close friend of Omni-Man and other superheroes as well, since he is a tailor who makes suits for all the heroes. He is also one of those people who were devastated by what Omni-Man turned out to be, since Omni-Man was a dear friend of his, with Debbie and Mark being almost like a family to him.

10. Zachary Quinto as Robot

Zachary Quinto has appeared multiple times in the Star Trek movies, where he took up the titular character of Spock. He has also been seen as Dr. Oliver Thredson in American Horror Story: Asylum, for which he bagged an Emmy nomination. He gives his voice to Robot, an Android controlled by a disfigured being who got the Mauler Twins to make a new body for himself using a sample of Rex-Splode’s DNA.

12.  Gillian Jacobs as Atom Eve

Appearing in Netflix’s Love as Mickey Dobbs, HBO’s Girls, and The Bear, Gillian Jacobs appears in the role of Atom Eve, who is a fellow teenage superhero in Mark’s team and also his class and college mate. Even in the comics, Atom Eve is one of the most powerful superheroes due to her ability to change the atomic structure of anything and bend it to whatever she wants to make out of them. In the comic version of Invincible, Atom Eve turns into one of the most important characters in the story and could have quite an important role in Season 4 with her newfound powers. However, the trailer suggests that there will be an issue with her powers, so let’s see where it goes.

11. Ross Marquand as The Immortal

Ross Marquand rose to popularity after portraying Aaron in The Walking Dead. Following this, he also gave his voice to Red Skull in Avengers: Infinity War and Endgame. In Invincible, he gives his voice to two different characters. Ross Marquand voices The Immortal, who is an immortal being who has been around for centuries and can only be killed if he is decapitated. After being an important character in the series for quite some time, he is now set to return in Season 4, as confirmed with the involvement of The Immortal.

12. Khary Payton as Black Samson

Khary Payton is another actor who found fame after appearing in The Walking Dead as King Ezekiel. His performance as Cyborg in multiple DC animated movies is a testament to how good a voice actor he is. In the Invincible cast, he takes up the role of Black Samson, who had lost his powers and was using a power suit to compensate for it. However, in season 2, he was almost killed while fighting Machine Head’s team of supervillains, but miraculously, his near-death experience brought back his power,s which is also greatly enhanced, as we got to see in Season 3, and he is now confirmed to return in Season 4.

13. Seth Rogen as Allen the Alien

Seth Rogen started his career as a teenage stand-up comedian, but later on, grew to produce some of the biggest movies and shows in Hollywood. As of now, he is the executive producer of The Boys, which is one of the most viewed shows on the internet, with season 5 currently in pre-production. He is also the executive producer of Invincible itself. In the series, he voices Allen the Alien, who is a Unopan and a representative of the Coalition of Planets. He appears in Invincible in season 2 and after a short misunderstanding, befriends Mark. Later on in the series, he was almost killed by Viltrumites, but after his recovery, he came back much stronger than he had ever been. By the end of season 2, he deliberately gets himself captured by Viltrumites to help Nolan escape from the Viltrumite captivity and fight against their empire. In Invincible season 3, both Allen and Nolan excaped and the trailer for Season 4 confirmed that he will come to Earth along with Nolan to recruit Mark and his allies to wage war against Viltrum.

14. Michael Dorn as Battle Beast

Battle Beast made his first apperance in Invincible Season 1, where he almost killed Mark, and then we saw him reappear in Invincible Season 2 and finally made an apperance in Invincible Season 3, where he was seen in the escape sequence of Allen and Omni-Man. Now, it has been confirmed by the trailer of Invincible Season 4 that Battle Beast will be returning in the upcoming season, and this time around, he will be an ally to Mark and his teammates.

15. Lee Pace as Thragg

Thragg is the most powerful Viltrumite and also the leader of the Viltrum Empire. His appearance has been long anticipated, and he is finally coming to our screens with Lee Pace lending his voice to the iconic character. We have already received the first look at the character in the trailer for Invincible Season 4, and if you have read the comics, you would be aware who Thagg is in Invincible and what he is capable of. So, it will be fun to see our protagonists go toe-to-toe with him.

16. Jeffrey Dean Morgan as Conquest

Conquest made his first appearance in Invincible in Season 3 and is voiced by none other than Jeffrey Dean Morgan. He most certainly was the most formidable foe Invincible stood against, and while Invincible, after breaking almost every bone in his body, managed to defeat him, Conquest was still not dead, and we see that Cecil tried to hold him, but as he healed, Conquest managed to escape and will be appearing in Invincible Season 4. Name Email ID

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