 Errol FlynnGeorge Armstrong Custer | George Armstrong Custer |
 Olivia de HavillandElizabeth Bacon | Elizabeth Bacon |
 Arthur KennedyNed Sharp | Ned Sharp |
 Charley GrapewinCalifornia Joe | California Joe |
 Gene LockhartSamuel Bacon, Esq. | Samuel Bacon, Esq. |
 Anthony QuinnCrazy Horse | Crazy Horse |
 Stanley RidgesMaj. Romulus Taipe | Maj. Romulus Taipe |
 John LitelGen. Phil Sheridan | Gen. Phil Sheridan |
 Walter HampdenWilliam Sharp | William Sharp |
 Sydney GreenstreetLt. Gen. Winfield Scott | Lt. Gen. Winfield Scott |
 Regis ToomeyFitzhugh Lee | Fitzhugh Lee |
 Hattie McDanielCallie | Callie |
 G.P. HuntleyLt. 'Queen's Own' Butler | Lt. 'Queen's Own' Butler |
 Frank WilcoxCapt. Webb | Capt. Webb |
 Joe SawyerSgt. Doolittle | Sgt. Doolittle |
 Minor WatsonSenator Smith | Senator Smith |
 Eddie AcuffCpl. Smith (uncredited) | Cpl. Smith (uncredited) |
 Tod AndrewsCadet Brown (uncredited) | Cadet Brown (uncredited) |
| CCyril ArchambaultLakota Sioux Warrior (uncredited) | Lakota Sioux Warrior (uncredited) |
 Irving BaconUniform Salesman (uncredited) | Uniform Salesman (uncredited) |
 Walter BaldwinSettler (uncredited) | Settler (uncredited) |
 Roy BarcroftOfficer (uncredited) | Officer (uncredited) |
 Hank Bell1st Michigan Officer (uncredited) | 1st Michigan Officer (uncredited) |
 Brooks BenedictWell-Wisher (uncredited) | Well-Wisher (uncredited) |
| EEdward BibyMilitary Officer (uncredited) | Military Officer (uncredited) |
 Hobart BosworthMr. Cartwright (uncredited) | Mr. Cartwright (uncredited) |
 Rudy BowmanTrooper (uncredited) | Trooper (uncredited) |
 Truman Bradley7th Michigan officer (uncredited) | 7th Michigan officer (uncredited) |
| MMoses BraveLakota Sioux Warrior (uncredited) | Lakota Sioux Warrior (uncredited) |
 Virginia BrissacWoman (uncredited) | Woman (uncredited) |
