While the Marvel Cinematic Universe's latest outing has enough outsized star power to go around, one of its sharpest casting decisions had zilch to do with that. For the voice-only role of Arishem the Judge, the Celestial who shepherds the Eternals and sends them on the mission that opens the film, director Chloé Zhao and casting directors Sarah Finn and Anna Tenney made the eminently commendable decision to hire an actual voice actor. And, while this actor may not be as much of a household name as his fellow castmates, he's certainly a superstar in his own field. David Kaye. He's one of the few performers to have played both Optimus Prime and Megatron in some of the Transformers animated shows, while he also lent his voice to both Professor X and Apocalypse in X-Men: Evolution. He's played several more Marvel characters in the past, as well as Clank in the Ratchet & Clank games. He also serves as the announcer for Last Week Tonight with John Oliver on HBO.