 | Tyrone Power als Andrea Orsini |
 | Orson Welles als Cesare Borgia |
 | Wanda Hendrix als Camilla Verano |
 | Marina Berti als Angela Borgia |
 | Katina Paxinou als Mona Zoppo |
 | Everett Sloane als Mario Belli |
 | Felix Aylmer als Marc Antonio Verano |
 | Eduardo Ciannelli als Art Dealer (uncredited) |
 | Eugene Deckers als Borgia Henchman (uncredited) |
 | Antonella Lualdi als (uncredited) |
| Henry King | Director |
| Milton Krims | Writer |
| Sol C. Siegel | Producer |
| Leon Shamroy | Director of Photography |
| Barbara McLean | Editor |
| Alfred Newman | Original Music Composer |
| Samuel Shellabarger | Novel |
| Mark-Lee Kirk | Art Direction |
| Lyle R. Wheeler | Art Direction |
| Elso Valentini | Set Decoration |
| Vittorio Nino Novarese | Costume Design |
| Joseph C. Behm | Assistant Director |
| Roger Heman Sr. | Sound |
| Charles Hisserich | Sound |
