 Gary CooperHoward Roark | Howard Roark |
 Patricia NealDominique Francon | Dominique Francon |
 Raymond MasseyGail Wynand | Gail Wynand |
 Kent SmithPeter Keating | Peter Keating |
 Robert DouglasElsworth Toohey | Elsworth Toohey |
 Henry HullHenry Cameron | Henry Cameron |
 Ray CollinsRoger Enright | Roger Enright |
 Moroni OlsenChairman | Chairman |
| JJerome CowanAlvah Scarret | Alvah Scarret |
| BBob AldenNewsboy (uncredited) | Newsboy (uncredited) |
 John AlvinYoung Intellectual (uncredited) | Young Intellectual (uncredited) |
 Morris AnkrumProsecutor (uncredited) | Prosecutor (uncredited) |
| LLois AustinFemale Party Guest (uncredited) | Female Party Guest (uncredited) |
 Griff BarnettJudge (uncredited) | Judge (uncredited) |
 Monte BlueGas Station Executive (uncredited) | Gas Station Executive (uncredited) |
 Gail BonneyWoman (uncredited) | Woman (uncredited) |
| RRalph BrooksCourtroom Spectator (uncredited) | Courtroom Spectator (uncredited) |
 Glen CavenderPedestrian Onlooker (uncredited) | Pedestrian Onlooker (uncredited) |
 Dorothy ChristySociety Woman (uncredited) | Society Woman (uncredited) |
 Tristram CoffinToohey's Secretary (uncredited) | Toohey's Secretary (uncredited) |
| TTom ColemanCourt Clerk (uncredited) | Court Clerk (uncredited) |
 G. Pat CollinsJury Foreman (uncredited) | Jury Foreman (uncredited) |
| JJames ConatyParty Guest (uncredited) | Party Guest (uncredited) |
| BBill DagwellBanner Shipping Clerk (uncredited) | Banner Shipping Clerk (uncredited) |
 Ann DoranWynand's Secretary (uncredited) | Wynand's Secretary (uncredited) |
 Lester DorrMinor Role (uncredited) | Minor Role (uncredited) |
 John DoucetteGus Webb (uncredited) | Gus Webb (uncredited) |
 Jay EatonParty Guest (uncredited) | Party Guest (uncredited) |
 Estelle EtterreWoman at Enright party (uncredited) | Woman at Enright party (uncredited) |
 Charles EvansBanner Board Member (uncredited) | Banner Board Member (uncredited) |
