Russell, an undersized but big-hearted terrier, dreams of having a family of his own. After running away from his pet store, Russell gets taken in by The Ferraros, who discover their new pet pooch has incredible wrestling skills.
| Actor | Role |
|---|---|
 John RatzenbergerMick Vaughn | Mick Vaughn |
 Mason CottonMax | Max |
 Fred WillardTJ | TJ |
 Will SassoHunk (voice) | Hunk (voice) |
 John HenniganThe Hammer | The Hammer |
 Sean GiambroneRussell (voice) | Russell (voice) |
 David MilchardNate | Nate |
 Mckenna GraceLena | Lena |
 Charles RobinsonMike | Mike |
 Kate ReindersColleen | Colleen |
 Michael P. NortheyAndrew | Andrew |
| AAmeko Eks Mass CarrollYoung Boy | Young Boy |
 Jesse ReidDerek | Derek |
 Steve RichmondOlder Max | Older Max |
 Kaitlyn MaherGrace | Grace |
 Nicholas HarrisonDieter Das Mountain | Dieter Das Mountain |
 Crystal the MonkeyHunk (uncredited) | Hunk (uncredited) |
 James CrescenzoMaximiliano | Maximiliano |
| MMilton McConvilleYoung Nate | Young Nate |
| AAustin SpencerIl Maniac | Il Maniac |
 Scotty MacButt the Clown | Butt the Clown |
| TTatiana GudegastClare | Clare |
 Sean QuanSean | Sean |
| MMichael OgbeiwiTom | Tom |
 Chris CoppolaDozer (voice) | Dozer (voice) |
 Aidan PringleVick Vice | Vick Vice |
 Ken LawsonFerraro Arena Referee | Ferraro Arena Referee |
 Brady RobertsBrady Malibu | Brady Malibu |
 Alex KlinerStan the Fan | Stan the Fan |
| SSusie WallReporter | Reporter |