Invincible Showrunners on Why Lee Pace Was Perfect for the Story’s Big Bad Thragg

By the end of Invincible‘s third season, Mark Grayson (Steven Yeun) seemed to have defeated the strongest Viltrumite out there. It nearly cost him his life and his principles, but Mark managed to stop the powerful Conquest, giving him and his friends hope that the Viltrum Empire could be nearing its end. But he has no idea what’s coming, Grand Regent Thragg.

Thragg has been a long-running character in the pages of Invincible comics, by writer Robert Kirkman and artists Cory Walker and Ryan Ottley, but he’ll be new to viewers of the Prime Video series. Well, his look will be new. His voice will be very familiar to fans of genre cinema and television, as it’s that of Lee Pace, he of Pushing Daisies, Halt and Catch Fire, and Guardians of the Galaxy. For Kirkman and Simon Racioppa, showrunners of the animated series, that experience made Pace the perfect choice to lend his voice to the dominating Thragg.

“I’ve always wanted to work with Lee Pace,” Kirkman admits to Den of Geek, recalling their shared orbit when The Walking Dead and Halt and Catch Fire were both in production at AMC. “I would run into him at events and things and admire him from afar. He just has this quiet power that he exudes with his voice that we thought would be absolutely perfect for that character. So the casting process was basically asking if Lee was available.”

“Will he please do the role?” Racioppa adds to the memory, before expounding on what makes Pace so perfect for Thragg.

“In the sessions with him, he just delivers over and over again. He has the best questions about the character, and he knows where the character is coming from, where he’s going. Like Robert says, he can sell power without volume and deliver intensity in a way that is difficult to find. A lot of other people sometimes think intensity means volume or means screaming loud.

“Lee’s able to give you intensity at a regular level, which is who Thragg is. Thragg doesn’t need to flex, Thragg is most powerful withdrawn.”

Thragg’s quiet intensity comes directly from the comics, where he serves as one of the book’s most important antagonists. Technically, Thragg first appeared in Invincible #11 (2004), when Nolan Grayson (J. K. Simmons) first told Mark about the Viltrum Empire. Thragg failed to stand out because, well, he looked like most other Viltrumite men, mustachioed and muscled, wearing a red suit.

When Thragg made his first proper appearance amidst the Viltrumite War arc from 2010, he was immediately more noticeable. Conquest boasted and flexed, up until the moment of his death. But Thragg just watched, waited, and seethed.

What does that power mean for Mark and his brother Oliver, aka Kid Omni-Man (Christian Convery)? Comic readers know the answer, but those watching the show will have to wait to find out. Besides, saying too much about what Thragg can do runs contrary to who he is. Thragg is all about showing his power instead of telling people about it, even if that showing is just in the tone of his voice.

“Lee can sell that power with his voice,” Racioppa says. “It was delightful working with him in that way.”

The first three episodes of Invincible season 4 premiere on Prime Video on March 18, 2026.