 Mickey RooneyHuckleberry Finn | Huckleberry Finn |
 Rex IngramJim | Jim |
 Walter ConnollyThe 'King' | The 'King' |
 William FrawleyThe 'Duke' | The 'Duke' |
 Lynne CarverMary Jane | Mary Jane |
 Jo Ann SayersSusan | Susan |
 Minor WatsonCapt. Brandy | Capt. Brandy |
 Elisabeth RisdonWidow Douglass | Widow Douglass |
 Victor Kilian'Pap' Finn | 'Pap' Finn |
 Clara BlandickMiss Watson | Miss Watson |
 Erville AldersonSheriff at Jail (uncredited) | Sheriff at Jail (uncredited) |
 Arthur AylesworthRiver Queen Pilot (uncredited) | River Queen Pilot (uncredited) |
 Irving BaconTad (uncredited) | Tad (uncredited) |
 Wade BotelerFirst Riverboat Captain (uncredited) | First Riverboat Captain (uncredited) |
 Ed BradyMan at the Show (uncredited) | Man at the Show (uncredited) |
 Harlan BriggsMr. Rucker (uncredited) | Mr. Rucker (uncredited) |
 Nora CecilMrs. Shackleford (uncredited) | Mrs. Shackleford (uncredited) |
 Harry CordingMan Stealing Watermelon (uncredited) | Man Stealing Watermelon (uncredited) |
 Frank DarienOld Jailer (uncredited) | Old Jailer (uncredited) |
 Sarah EdwardsAnnie Rucker (uncredited) | Annie Rucker (uncredited) |
 Jesse GravesWilkes' Black Butler (uncredited) | Wilkes' Black Butler (uncredited) |
 George GuhlRiver Queen Engineer (uncredited) | River Queen Engineer (uncredited) |
 Roger ImhofJudge Logan at Jim's Trial (uncredited) | Judge Logan at Jim's Trial (uncredited) |
 Robert Emmett KeaneMr. Barklett the Lawyer (uncredited) | Mr. Barklett the Lawyer (uncredited) |
 Lew KellyFirst Riverboat Pilot (uncredited) | First Riverboat Pilot (uncredited) |
 Leni LynnSchool Girl (uncredited) | School Girl (uncredited) |
| AAnne O'NealMiss Bartlett (uncredited) | Miss Bartlett (uncredited) |
 Sarah PaddenWoman Wanting Needle Threaded (uncredited) | Woman Wanting Needle Threaded (uncredited) |
| AAlonzo PriceDeputy (uncredited) | Deputy (uncredited) |
 Mickey RentschlerHarry (uncredited) | Harry (uncredited) |
