 | Richard Burton als SS-Obersturmbannführer Herbert Kappler |
 | Marcello Mastroianni als Father Pietro Antonelli |
 | Peter Vaughan als Field Marshal Albert Kesselring |
 | Leo McKern als Gen. Kurt Maelzer |
 | John Steiner als SS-Standartenführer Eugen Dollmann |
 | Anthony Steel als SS-Sturmbannführer Domizlaf |
 | Robert Harris als Father Pancrazio |
 | Anthony Dawson als SS-Brigadeführer Wilhelm Harster |
 | Guidarino Guidi als Interior Minister Guido Buffarini Guidi |
 | Renzo Montagnani als Police Chief "Questore" Pietro Caruso |
| Dennis Burgess als SS-Obersturmführer Schultz |
| Brook Williams als SS-Hauptsturmführer Erich Priebke |
 | Giancarlo Prete als Paolo |
 | Delia Boccardo als Elena |
 | Renzo Palmer als Giorgio |
 | Duilio Del Prete als Partisan |
 | Gustavo De Nardo |
| Douglas Hare als Young German Soldier |
| Carlos de Carvalho |
 | Jacques Herlin als Giovanni |
 | Shirley Corrigan |
 | Massimo Sarchielli als First partisan with watch on Via Rasella's window |
| Anthony Dawson als Lt. Col. Harster |
| Kippy Lancaster |
 | Nazzareno Natale als Partisan with glasses |
 | Luigi Antonio Guerra |
| Fiore Altoviti |
| Ugo Cardea als Partisan |
| Luca Bonicalzi |
| Giuliano Petrelli |
 | Marino Masé als Third partisan in Via rasella's window |
 | Orazio Stracuzzi als Partisan with machine gun |
 | Adolfo Lastretti als Man in via Rasella |
 | Enzo Consoli als Real street cleaner in Via Rasella |
 | Arnaldo Caivano als Ardeatine Massacre Victim (uncredited) |
| George P. Cosmatos | Director |
| Françoise Bonnot | Editor |
| Carlo Ponti | Producer |
| Roberto Silvi | Editor |
| Bruno Nicolai | Conductor |
| Arrigo Equini | Production Design |
| Gaia Romanini | Costume Design |
| Paolo Infascelli | Production Manager |
| Cesare Allione | Camera Operator |
| Luciano Sacripanti | First Assistant Director |
| Carlo Palmieri | Sound |
| Piero Fondi | Boom Operator |
| Arrigo Breschi | Set Decoration |
| Mario Van Riel | Makeup Artist |
| Giusy Bovino | Hairstylist |
| Lanfranco Diotallevi | Unit Manager |
| Elvira D'Amico | Script Supervisor |
| Nadia Moscovini | Assistant Editor |
| Luciano Anzellotti | Foley Artist |
| Massimo Anzellotti | Foley Artist |
| Fausto Ancillai | Sound Mixer |
| Marcello Gatti | Director of Photography |
| Ennio Morricone | Original Music Composer |
| Robert Katz | Novel |
| Robert Katz | Screenplay |
| George P. Cosmatos | Screenplay |
| Lucio De Caro | Screenplay |
| Fabio Mauri | Screenplay |
| Marcello D'Amico | Executive Producer |
