Fanboy and Chum Chum

Jeff Bennett
Boog (voice) / Hank (voice) / Mr. Muffin (voice) / Duke / Mr. Muffin / Scrivener...

Wyatt Cenac
Lenny (voice) / Michael Johnson (voice)

David Hornsby
Fanboy (voice) / Fanbot (voice)

Nika Futterman
Chum Chum (voice)

Jamie Kennedy
Kyle (voice)

Josh Duhamel
Oz (voice)

Dyana Liu
Yo (voice)

Estelle Harris
Mrs. Harmounian (voice) / Oz's Mom (voice)

Dee Bradley Baker
Mecha-Tech (voice) / Scampers (voice)

Candi Milo
Francine / Lupe / Mrs. Cram (voice)

John DiMaggio
Yum Yum (voice)

Kari Wahlgren
Nancy / Cher (voice)

Kevin Michael Richardson
Berry (voice)

Don Newhouse
Himself

Joe Hursley
President