Steven Yeun plays Invincible and J.K. Simmons plays Omni-Man.
There's also a whole bunch of other actors in undisclosed roles.
https://www.hollywoodreporter.com/live-feed/steven-yeun-sandra-oh-mark-hamill-voice-cast-robert-kirkmans-invincible-1181587
There's also a whole bunch of other actors in undisclosed roles.
https://www.hollywoodreporter.com/live-feed/steven-yeun-sandra-oh-mark-hamill-voice-cast-robert-kirkmans-invincible-1181587