John DiMaggio (born September 4, 1968) is an American voice over artist. DiMaggio is best known to bat-fans for voicing Joker in the Under the Red Hood animated feature.
As a journeyman actor in the VO community, he also voiced Rhino and Mugsy in The Batman, Aquaman, Gorilla Grodd, Mr. Freeze and Black Mask in Batman: The Brave and the Bold and King Shark in Batman: Assault on Arkham.