
Peter Cullen is a Canadian voice actor whose decades-long career includes lending his voice to Thaedus in the animated series Invincible, produced by Skybound Entertainment. He is best recognized worldwide as the voice of Optimus Prime across the Transformers franchise.
In Invincible, Cullen provides the voice of Thaedus, a role that adds to his long list of authoritative, gravel-voiced animated characters. The casting echoes the commanding presence he is famous for elsewhere in animation, most notably as the leader of the Autobots. His work on the series ties into Skybound Entertainment's slate of adult animated productions.
Beyond Invincible, Cullen is best remembered as the original voice of Optimus Prime, first in the 1980s Transformers cartoon and later in the live-action movie franchise that began in 2007. His other signature parts range from the melancholy donkey Eeyore in Disney's Pooh universe to the wisecracking rodent Monterey Jack on the Rescue Rangers cartoon, plus the debut voice of KARR on Knight Rider and the feral vocal effects behind the alien hunter in Predator. In 2023, the industry's National Academy of Television Arts & Sciences honored him with a Lifetime Achievement Award at the second Children's and Family Emmy Awards.

Naruto vs Luffy with the twist nobody asked for: Luffy tickled Hinata on date night, and she kind of liked it. We break down the whole fight and commit to a winner....

There are no women on Namek. That isn't an oversight, it's the biology. Why we handed Piccolo the one thing his own species rules out, and why it had to be trap soul....
Peter Cullen voices Thaedus in Invincible, adding to his long list of authoritative, gravel-voiced animated characters. The role ties into Skybound Entertainment's slate of adult animated productions.
Cullen is best known worldwide as the voice of Optimus Prime, first in the 1980s Transformers cartoon and later in the live-action movie franchise that began in 2007. It remains the defining role of his decades-long career.
Cullen voiced the melancholy donkey Eeyore in Disney's Pooh universe and the wisecracking rodent Monterey Jack on the Rescue Rangers cartoon. Both roles sit alongside his work as Optimus Prime.
Cullen provided the debut voice of KARR on Knight Rider and the feral vocal effects behind the alien hunter in Predator. Both credits show the range of his gravel-voiced performances.
In 2023, the National Academy of Television Arts & Sciences honored Cullen with a Lifetime Achievement Award at the second Children's and Family Emmy Awards. The award recognized his decades-long voice-acting career.
This content is original writing by Daddy Jim Headquarters based on the Invincible anime series, manga, and official materials. Invincible was created by Robert Kirkman, Cory Walker and Ryan Ottley, published by Image Comics / Skybound, and animated by Skybound Animation. All rights to Invincible and its characters belong to their respective owners. Episode and chapter references are cited where applicable.
Rights holders
All rights belong to their respective owners.
Character and scene imagery on this site is original artwork by Daddy Jim Headquarters, not screenshots or licensed imagery. Official cover art is used on three types of pages for editorial commentary:
Official resources:
Daddy Jim Headquarters maintains this encyclopedia. If you spot an error, a translation issue, or something that doesn't look right, let us know.