Mickey Rooney as Huckleberry Finn

Rex Ingram as Jim

Walter Connolly as The 'King'

William Frawley as The 'Duke'

Lynne Carver as Mary Jane

Jo Ann Sayers as Susan

Minor Watson as Capt. Brandy

Elisabeth Risdon as Widow Douglass

Victor Kilian as 'Pap' Finn

Clara Blandick as Miss Watson

Erville Alderson as Sheriff at Jail (uncredited)

Arthur Aylesworth as River Queen Pilot (uncredited)

Irving Bacon as Tad (uncredited)

Wade Boteler as First Riverboat Captain (uncredited)

Ed Brady as Man at the Show (uncredited)

Harlan Briggs as Mr. Rucker (uncredited)

Nora Cecil as Mrs. Shackleford (uncredited)

Harry Cording as Man Stealing Watermelon (uncredited)

Frank Darien as Old Jailer (uncredited)

Sarah Edwards as Annie Rucker (uncredited)

Jesse Graves as Wilkes' Black Butler (uncredited)

George Guhl as River Queen Engineer (uncredited)

Roger Imhof as Judge Logan at Jim's Trial (uncredited)

Robert Emmett Keane as Mr. Barklett the Lawyer (uncredited)

Lew Kelly as First Riverboat Pilot (uncredited)

Leni Lynn as School Girl (uncredited)

Anne O'Neal as Miss Bartlett (uncredited)

Sarah Padden as Woman Wanting Needle Threaded (uncredited)

Alonzo Price as Deputy (uncredited)

Mickey Rentschler as Harry (uncredited)

Johnny Walsh as Sam (uncredited)

E. Alyn Warren as Mr. Shackleford (uncredited)

Billy Watson as Eliot (uncredited)

Delmar Watson as Joe (uncredited)

Harry Watson as Ben Donaldson (uncredited)