 Richard WidmarkCapt. Thomas Archer | Capt. Thomas Archer |
 Carroll BakerDeborah Wright | Deborah Wright |
 Karl MaldenCapt. Wessels | Capt. Wessels |
 Sal MineoRed Shirt | Red Shirt |
 Dolores del RíoSpanish woman | Spanish woman |
 Ricardo MontalbanLittle Wolf | Little Wolf |
 Gilbert RolandDull Knife | Dull Knife |
 Arthur KennedyDoc Holliday | Doc Holliday |
 James StewartWyatt Earp | Wyatt Earp |
 Edward G. RobinsonSecretary of the Interior Carl Schurz | Secretary of the Interior Carl Schurz |
 Patrick WayneSecond Lieut. Scott | Second Lieut. Scott |
 Elizabeth AllenGuinevere Plantagenet | Guinevere Plantagenet |
 John CarradineJeff Blair | Jeff Blair |
 Victor JoryTall Tree | Tall Tree |
 Mike MazurkiSr. First Sergeant | Sr. First Sergeant |
 George O'BrienMajor Braden | Major Braden |
 Sean McCloryDr. O'Carberry | Dr. O'Carberry |
 Judson PrattMayor Dog Kelly | Mayor Dog Kelly |
| CCarmen D'AntonioPawnee Woman | Pawnee Woman |
 Ken CurtisJoe | Joe |
 Harry Carey, Jr.Trooper Smith (uncredited) | Trooper Smith (uncredited) |
 Ben JohnsonTrooper Plumtree (uncredited) | Trooper Plumtree (uncredited) |
 Mae MarshWoman (uncredited) | Woman (uncredited) |
 Denver PyleSen. Henry (uncredited) | Sen. Henry (uncredited) |
| BBert StevensTownsman (uncredited) | Townsman (uncredited) |
 Chuck RobersonJessie (uncredited) | Jessie (uncredited) |
 Chuck HaywardTrooper (uncredited) | Trooper (uncredited) |
 Al BainTownsman (uncredited) | Townsman (uncredited) |
 Walter BaldwinJeremy Wright (uncredited) | Jeremy Wright (uncredited) |
 Bill BorzageTownsman (uncredited) | Townsman (uncredited) |
