Ben 10: Hero of All Ages/Protagonist

The Team
 * Ben Tennyson-Judd Nelson
 * Kevin Levin-Charlie Schlatter
 * Rook Blonko-Bumper Robinson
 * James Roarin-Gary Oldman
 * Blake Howard-Joesph Gordon Levitt
 * Colonel Rozum-Liam Neeson
 * Kenny Tennyson-Tara Strong
 * Jennifer Tennyson (Deceased)-Ashley Johnson
 * Alanna Levin-Grey DeLisle
 * Devlin Levin-Greg Cipes
 * Alfred Wellington-J.K. Simmons
 * Molly Gunther-B.J. Ward
 * Reed-Peter Shukoff
 * Myaxx(Deceased)-Vyvan Pham
 * Seebik (Deceased)-Corey Burton
 * Lackno (Deceased)-Eric Bauza
 * Y-IT-Derrick J. Wyatt
 * Gluto-Dee Bradley Baker
 * Driba-Eric Bauza
 * Mech-Dee Bradley Baker
 * Magister Pyke-Eric Bauza
 * Fergi (Deceased)-Ashley Johnson
 * Blukic-Paul Eiding
 * Tack-Charlie Schlatter
 * Ship-Vyvan Pham
 * Cooper-Chris Pratt
 * Helen Wheels-Juliet Landua
 * Manny Armstrong-Khary Payton
 * Eunice-Molly Quinn
 * Baz-El-Dee Bradley Baker
 * Donstone-John DiMaggio
 * Alan Albright-Zeno Robinson
 * Charmcaster-Kari Wahlgren
 * Sugilite-Dee Bradey Baker
 * Paradox-David McCallum
 * Magister Korwak-Eric Bauza
 * Magister Patelliday-Rob Paulsen
 * Jerry-Christian Bale
 * Hex (Deceased)-Khary Payton
 * Magister Hulka (Deceased)-Miguel Ferrer
 * Tetrax Shard (Deceased)-Dave Fennoy
 * Gwen Tennyson (Deceased)-Tara Strong
 * Julie Tennyson (Deceased)-Vyvan Pham
 * Max Tennyson (Deceased)-Paul Eiding
 * Azmuth (Assumed Deceased)-Rene Auberjonois
 * Retaliator (Assumed Deceased)-Robert David Hall
 * Ken Tennyson (Deceased)-Yuri Lowenthal
 * Verdona Tennyson (Deceased)-Barbara Bain

Revonnah Inhabitats

 * Reyonna-Vvyham Pham
 * Rook Bralla-Kimberly Brooks
 * Rook Shi-Collen O' Shaughnessey
 * Rook Shim-B.J. Ward
 * Rook Shar-Alanna Ubach
 * Young One-Tara Strong
 * Rook Da (Deceased)-Eric Bauza

The Resistance

 * Ester-Tara Platt
 * Mr. Baumann-Corey Burton
 * Pakmar-Tara Strong
 * Tini-Marion Cotillard (Deceased)
 * Ultimos (Deceased) -Henry Cavill
 * Synaptak-Leanordo DeCaprio (Deceased)
 * Xylene-Diane Lane
 * Sunny Tennyson (Deceased)-Amy Adams
 * Antonio (Deceased)-Micheal Shannon
 * Gaterboy-Steve Blum
 * Porcupine-Laurence Fishburne
 * Haplor (Deceased)-Russel Crowe
 * Hugh-Kevin Costner
 * Phil-Chrisopher Meloni
 * HackWire- Chandler Riggs
 * Kai Green- Racheal McAdams
 * Edmond North-Channing Tatum
 * Loovis Slerdverk-Lucas Bryant

The Andromeda Victims

 * Bivalvan (Deceased)-Dee Bradley Baker
 * Galapagus (Deceased)-Bumper Robinson
 * P'andor (Deceased)-Dee Bradley Baker
 * Andreas (Deceased)-John DiMaggio
 * Ra'ad (Deceased)-Yuri Lowenthal

Characters Confirmed To Appear in Season 1

 * Reiny