The Grim Adventures of Billy and Mandy Wiki
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Richard Steven Horvitz is the voice actor for Billy, Harold and Darold.

He's best known as the voice of Daggett Beaver from The Angry Beavers, KAOS from Skylanders, Alpha 5 in Mighty Morphin Power Rangers to Power Rangers Turbo, Moxxie from Helluva Boss and the forever iconic Invader Zim.

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