A dramatised life of Samuel Langhorn Clemens, or Mark Twain.
| Actor | Role |
|---|---|
 Fredric MarchSamuel Langhorne Clemens (Mark Twain) | Samuel Langhorne Clemens (Mark Twain) |
 Alexis SmithOlivia Langdon Clemens | Olivia Langdon Clemens |
 Donald CrispJ.B. Pond | J.B. Pond |
 Alan HaleSteve Gillis | Steve Gillis |
 C. Aubrey SmithOxford Chancellor | Oxford Chancellor |
 John CarradineBret Harte | Bret Harte |
 Robert BarratHorace E. Bixby, Riverboat Captain | Horace E. Bixby, Riverboat Captain |
 Walter HampdenJervis Langdon | Jervis Langdon |
 Joyce ReynoldsClara Clemens | Clara Clemens |
 William HenryCharles Langdon | Charles Langdon |
| CCharles WaldronDr. Quintard (uncredited) | Dr. Quintard (uncredited) |
 Willie BestButler | Butler |
 Nana BryantMrs. Langdon | Mrs. Langdon |
 Dickie JonesYoung Samuel Clemens | Young Samuel Clemens |
 Frank DarienToy Shop Clerk | Toy Shop Clerk |
 Joseph CrehanUlysses S. Grant | Ulysses S. Grant |
| HHazel DohlmanAudience Member (uncredited) | Audience Member (uncredited) |
 Libby TaylorWoman (uncredited) | Woman (uncredited) |