Question: Which character in the Harry Potter series was dubbed by the same Canadian actor who dubbed the leader of the Autobots?
Sentence (from "Hubert Gagnon"): He was also the voice of Optimus Prime in the Quebec dubbing of the original "Transformers" cartoon, but for the 2007 film, he was replaced by Guy Nadon, who had coincidentally portrayed Sideshow Bob alongside Gagnon in the québécois dubbed version of The Simpsons.
Relevant evidence: Yes