Ben 10: Ultimate Alien

Yuri Lowenthal

Ben Tennyson (voice)

Ashley Johnson

Gwen Tennyson (voice)

Greg Cipes

Kevin Levin (voice)

Dee Bradley Baker

Humungosaur (voice)

Jeff Bennett

Major Domo / Hugh (voice), Azmuth (voice), Magister Labrid / Major General (voice), Pops Vreedle / Jailer (voice)

Chris Pratt

Cooper (voice)

Powers Boothe

Sunder (voice)

Peter Stormare

King Xarion / King Viktor (voice)

Beth Littleford

Sandra Tennyson (voice)

J.K. Simmons

Magister Gilhil / Plumber (voice)

Scott Menville

Jimmy / J.T. / Pilot 2 (voice), Jimmy Jones (voice), J.T. (voice)

Greg Ellis

Prince Gyula / Cyborg #2 (voice), Dagonet / Reporter Chet Rigby (voice)

Fred Tatasciore

Staradisimus / Forever Knight #3 (voice), Quince / Robot Guard (voice), Foreman / Surgeon / Hammer (voice)

Nicholas Guest

Simons / Worker / Guest (voice)

Peter MacNicol

Oliver / Forever Knight #1 (voice)

Matt Levin

Cash (voice)

Tara Strong

Serena / Young Ben Tennyson (voice)

Kevin Michael Richardson

Kwarrel (voice), Magister Pyke (voice)

Xander Berkeley

Warden Morgg / Trukk (voice)

Brian George

Victor Valadis / Janitor (voice)

Miguel Ferrer

Magister Hulka / Alpha #4 (voice)

Rob Paulsen

Rhomboid Vreedle / Magister Patelliday (voice), Baz-El / Forever Knight #1 / Churl #4 (voice), Technician / Rhomboid Vreedle / Engineer #2 (voice)

Charlie Schlatter

Tack / Plumber (voice)

Olivia Hack

Emily (voice)

Jason Marsden

Young Max Tennyson (voice), Antonio (voice)

Paul Eiding

Max Tennyson / Guard #1 / Guard #2 (voice)

David McCallum

Professor Paradox (voice)

Juliet Landau

Natalie Tennyson / Melinda (voice), Fritz (voice), Verdona Tennyson / Waitress (voice)

James Arnold Taylor

Plumber Officer / Brannigan / Kolar (voice), Announcer / Fake Vilgax / Fridge (voice)

Adam Wylie

Pierce / Forever Knight #3 (voice)

Molly C. Quinn

Eunice / Computer (voice)

Diedrich Bader

Simian (voice)

Jon Polito

Mizaru (voice)

Dwight Schultz

Dr. Animo / Teacher #2 (voice), Sheriff / Dr. Animo (voice)

Alexander Polinsky

Argit (voice)

Tia Texada

Elena Validus (voice)

Keone Young

Julie's Dad / Repair Man / Cop (voice)

Bill Mumy

Agent Bryson (voice)

Vicki Lewis

Agent Locke (voice)

Peter Renaday

Old George (voice), Sir George (voice)

Diane Delano

Ma Vreedle / Pretty Boy Vreedle (voice)

Robin Atkin Downes

Sir Cyrus / Additional Voices (voice)

Richard Doyle

Driscoll / Additional Voices (voice)

Khary Payton

Hex (voice)

Kari Wahlgren

Charmcaster (voice)

Christopher McDonald

Captain Nemesis (voice)

Wil Wheaton

Mike Morningstar / Darkstar (voice)

Marianne Muellerleile

Maureen (voice)

Tara Platt

Jennifer Nocturne (voice)

Danny Jacobs

Captain / Police Dispatch / Dr. Pervis (voice)

Patrick Cavanaugh

Winston / Esoterica / Additional Voices (voice)

James Remar

Vilgax (voice)

John DiMaggio

Aggregor (voice), Diagon (voice), Audience Member / Will Harangue / Rath (voice), Plumber / Aggregor (voice), Spellbinder / Addwaitya / Diagon (voice), Will Harangue / Rath (voice), Foreverduke838 (voice), Ultimate Aggregor / Volann Commander (voice), Magister Coronach / Octagon Vreedle (voice), Conduit Edwards / Carnival Barker (voice), Will Harangue / Octagon Vreedle (voice), Rath / Conduit Edwards / Diagon (voice), Forever Knight #2 / Rath / TV Reporter (voice), Swamps / Rath Albedo / V.O. Announcer (voice), Trash Monster / Colonel Rozum / Additional Voices (voice), Addwaitya / Aggregor / Faint Voice (voice), Vulkanus / Rath (voice), Young Four Arms / Aggregor (voice)

Jim Piddock

King Urien / Color Commentator / Chair Umpire (voice)

Vyvan Pham

Julie Yamamoto / Ship (voice), Erin / Julie Yamamoto (voice), Julie Yamamoto (voice), Julie Yamamoto / Computer Voice (voice), Mrs. Jones (voice)

Zeno Robinson

Alan Albright / Heatblast (voice)

Tress MacNeille

Zennith (voice)

Sean Donnellan

Cameraman / Thug / Tech (voice), Ben 10,000 / Eon (voice)