Yuri Lowenthal

Ben Tennyson (voice)

Tara Strong

Young Ben Tennyson (voice)

Bumper Robinson

Rook Blonko (voice)

Paul Eiding

Grandpa Max (voice)

Greg Cipes

Kevin Levin (voice)

David Kaye

Cannonbolt / Heatblast / Khyber the Huntsman (voice)

John DiMaggio

Armodrillo / Fourarms (voice)

Eric Bauza

Dr. Psychobos / Diamondhead / Grey Matter (voice)

Dee Bradley Baker

Crashhopper / Stinkfly / Spidermonkey / Wildmutt (voice)

Ashley Johnson

Gwen Tennyson (voice)

René Auberjonois

Azmuth (voice)

Charlie Adler

Hokestar (voice)

Corey Burton

Malware / Mr. Bowman (voice)

Rob Paulsen

Magister Patelliday (voice)

Dwight Schultz

Dr. Animo (voice)

Alexander Polinsky

Argit (voice)

Kevin Michael Richardson

Emperor Milleous (voice)

Kimberly Brooks

Serena (voice)

Tara Platt

Ester (voice)