Yuri Lowenthal

as Ben Tennyson /Feedback /Sock Vendor (voice)

Ashley Johnson

as Gwen Tennyson (voice)

Greg Cipes

as Kevin Levin (voice)

Dee Bradley Baker

as Heatblast /Eatle /Humungousaur /Jury Rigg /Psyphon /Lodestar /Spidermonkey / NRG /Water Hazard /Psyphon (voice)

Peter Renaday

as Sir George (voice)

Vyvan Pham

as Julie Yamamoto /Ship (voice)

James Remar

as Vilgax (voice)

John DiMaggio

as Diagon/ Four Arms /Bubble Helmet /Zombozo / Armodrillo/ Tentacle Vendor (voice)

Scott Menville

as Jimmy Jones (voice)

Jeff Bennett

as Azmuth (voice)

Tara Strong

as Young Ben Tennyson /Pakmar / Alien Mother /Little Girl (voice)

Bumper Robinson

as Rook Blonko /Bloxx /Terraspin /Smoothie Vendor (voice)

Paul Eiding

as Max Tennyson /Zed /Liam (voice)

David A. Kaye

as Cannonbolt /Shocksquatch /Khyber /Cyanic Alien (voice)

Corey Burton

as Malware /Mr. Baumann (voice)

Rob Paulsen

as Magister Patelliday /Tummyhead /Alien Driver (voice)