Christopher Diamantopoulos is a Canadian actor and comedian who voices Donald Ferguson, Todd, Isotope, Doc Seismic, and various others in Invincible.
His acting roles include Russ Hanneman in the HBO series Silicon Valley, Moe Howard in the 2012 film The Three Stooges, Finn in Good Girls Revolt, and the voice of Mickey Mouse in the eponymous television series. He also voiced Green Arrow in the Batman Unlimited series of films and shorts.