 | Malcolm McDowell als Caligula |
 | Teresa Ann Savoy als Drusilla |
 | Guido Mannari als Macro |
 | John Gielgud als Nerva |
 | Peter O'Toole als Tiberius |
 | Giancarlo Badessi als Claudius |
 | Bruno Brive als Gemellus |
 | Adriana Asti als Ennia |
 | Leopoldo Trieste als Charicles |
 | Paolo Bonacelli als Chaerea |
 | John Steiner als Longinus |
 | Mirella D'Angelo als Livia |
 | Helen Mirren als Caesonia |
| Rick Parets als Mnester |
| Paula Mitchell als Subura Singer |
 | Osiride Pevarello als Giant |
 | Donato Placido als Proculus |
 | Anneka Di Lorenzo als Messalina |
 | Lori Wagner als Agrippina |
 | Maria Mascarielli als Banquet Woman (uncredited) |
 | Donatella Damiani als Breastfeeding nurse (uncredited) |
 | Mario Pascucci als Man at Banquet (uncredited) |
 | Tony Casale als Senator (uncredited) |
| Giulio Mastri | Production Secretary |
| Peter Boita | Associate Editor |
| Alba Ravaioli | Costumer |
| Antonio Tonti | Assistant Camera |
| Calì Said | Assistant Camera |
| Antonio Rinaldi | Gaffer |
| Giuliano Michisanti | Best Boy Electric |
| Dino Mezzoprete | Grip |
| Ettore Corso | Assistant Camera |
| Domenico Caiuli | Best Boy Electric |
| Claire Simpson | Assistant Editor |
| Mario Vitali | Best Boy Electric |
| Maria Ruhle | Unit Publicist |
| Giuseppe Pennese | Choreographer |
| Claudio Maimone | Assistant Editor |
| Luciano Vinciguerra | Best Boy Electric |
| Cristo Verrillo | Best Boy Electric |
| Enrico Sasso | Camera Operator |
| Vincenzo Mura | Best Boy Electric |
| Nazzareno Marini | Best Boy Electric |
| Luciano Giammei | Best Boy Electric |
| Bruno Nicolai | Conductor |
| Olga Rendina | Costumer |
| Bruna Mariani | Costumer |
| Anna Foresi | Costumer |
| Adriana Fiorato | Costumer |
| Gregorio Simili | Wardrobe Master |
| Gloria Musetta | Wardrobe Master |
| Ettore Trivelli | Best Boy Electric |
| Emanuele Polidoro | Grip |
| Valerio Garzia | Best Boy Electric |
| Michele Di Lauro | Grip |
| Giovanbattista Di Cicco | Best Boy Electric |
| Arnaldo Ceccarelli | Grip |
| Paolo De Andrei | Accountant |
| Stuart Urban | Assistant Editor |
| A.G. Broderick | Assistant Editor |
| Adriana Mattiozzi | Costumer |
| Massimo Rinaldi | Best Boy Electric |
| Francesco Pizzonia | Grip |
| Patrizio Mollichella | Grip |
| Gianfranco De Cinti | Best Boy Electric |
| Marco Davoli | Grip |
| Giorgio Ubaldi | Stunt Coordinator |
| Rodney Glenn | Assistant Editor |
| Franca Paoletti | Costumer |
| Dino Paoletti | Best Boy Electric |
| Alberto Nannicini | Best Boy Electric |
| Stelio Fioretti | Best Boy Electric |
| Franco Boccini | Best Boy Electric |
| Guido Rosina | Security |
| Ivo Spila | Assistant Camera |
| Enrico Maggi | Assistant Camera |
| Gianni Gentili | Best Boy Electric |
| Guerrino Francescangeli | Best Boy Electric |
| Vittorio Contino | Best Boy Electric |
| Marcello Cardarelli | Best Boy Electric |
| Fulvio Armanni | Assistant Editor |
| Tonino Manfrini | Costumer |
| Romolo Mancini | Costumer |
| Luciana Mancini | Costumer |
| Aldo Gentili | Best Boy Electric |
| Mario Fara | Best Boy Electric |
| Italo di Stefano | Best Boy Electric |
| Giuseppe Di Biase | Camera Operator |
| Fausto Cenci | Grip |
| Roberto Petani | Grip |
| Francesco Pandolfi | Best Boy Electric |
| Quirino Fantauzzi | Key Grip |
| Oreste De Falco | Accountant |
| Lidia Leonardi | Costumer |
| Franco Rinaldi | Grip |
| Silvano Pigu | Grip |
| Tito LeDuc | Choreographer |
| Sergio Spila | Gaffer |
| Sabino Schiavoni | Grip |
| Antonio Mollichella | Grip |
| Alfio Lamoratta | Best Boy Electric |
| Egisto Calascibetta | Grip |
| Tinto Brass | Camera Operator |
| Alfio Ambrogi | Best Boy Electric |
| Walter Alford | Unit Publicist |
| Alvaro Romagnoli | Best Boy Electric |
| Michele Mele | Grip |
| Aldo Laureti | Best Boy Electric |
| Alberto Grassi | Best Boy Electric |
| Augusto Gianelli | Best Boy Electric |
| Ivo Palazzi | Production Secretary |
| Sergei Prokofiev | Music |
| Aram Khachaturyan | Music |
| Stefano Curti | Assistant Editor |
| Riccarda Pierconti | Seamstress |
| Silvano Tessicini | Assistant Camera |
| Sabatino Sperandeo | Best Boy Electric |
| Giuseppe Scansalegna | Best Boy Electric |
| Sergio Rossi | Grip |
| Marcello Puccio | Best Boy Electric |
| Carlo Milani | Assistant Camera |
| Salvatore Gentile | Best Boy Electric |
| Federico Del Zoppo | Camera Operator |
| Bruno Cocco | Grip |
| Francesco Paolo Alfano | Grip |
| Masolino D'Amico | Translator |
| Mario Borgognoni | Production Secretary |
| Massimo Spano | Assistant Editor |
| Peter Krook | Assistant Editor |
| Iolanda Di Pasquale | Costumer |
| Giovanni Antonio Xaiz | Assistant Camera |
| Franco Verticchio | Grip |
| Roberto Ridolfi | Best Boy Electric |
| Enrico Priori | Assistant Camera |
| Silvano Michisanti | Best Boy Electric |
| Franco Di Bernardino | Grip |
| Francesco Cinti | Best Boy Electric |
| Carla Cipriani | Continuity |
| Bruno Nicolai | Orchestrator |
| Agnese Matiozzi | Costumer |
| Giselda Domenicucci | Costumer |
| Aldo Venturi | Grip |
| Maurizio Rossi | Best Boy Grip |
| Francesco Quattrone | Best Boy Electric |
| Antonio Piselli | Best Boy Electric |
| Frank Palazzo | Grip |
| Giovanni Maria Gambella | Best Boy Electric |
| Franco Fabietti | Grip |
| Nicola De Luca | Best Boy Electric |
| Osiride Pevarello | Stunts |
| Otello Polci | Shoe Design |
| Pietro Santarelli | Key Grip |
| Nazzareno Belardinelli | Best Boy Electric |
| Ettore Zampagni | Best Boy Electric |
| Arnaldo Parenti | Best Boy Electric |
| Alessio Gelsini Torresi | Assistant Camera |
| Romano di Chio | Grip |
| Giancarlo Lui | Additional Writing |
| Paolo Heusch | Casting Director |
| Lamberto Biseo | Assistant Makeup Artist |
| Luciana Fastelli | Assistant Hairstylist |
| Lucia La Porta | Assistant Makeup Artist |
| Galileo Mandini | Assistant Hairstylist |
| Simonetta Pirino | Assistant Hairstylist |
| Fabrizio Sforza | Assistant Makeup Artist |
| Maurizio Trani | Assistant Makeup Artist |
| Renato Mondragone | Props |
| Nello Falcone | Painter |
| Giancarlo Di Crosta | Assistant Art Director |
| Franco Rossellini | Line Producer |
| Roberto Tatti | Casting Director |
| Amedeo Alessi | Assistant Makeup Artist |
| Wanda Antonelli | Assistant Hairstylist |
| Otello Bartolini | Assistant Art Director |
| Malcolm McDowell | Additional Dialogue |
| Marcella Favella | Assistant Hairstylist |
| Mario Michisanti | Assistant Makeup Artist |
| Antonio Petruzziello | Carpenter |
| Giuliano Macale | Carpenter |
| David Grimsdale | Assistant Dialogue Editor |
| Nino Baragli | Editor |
| Tinto Brass | Editor |
| Clementina Battello | Assistant Hairstylist |
| Roberto Centanni | Assistant Makeup Artist |
| Fernanda De Rossi | Assistant Makeup Artist |
| Gabriele Polverosi | Second Assistant Director |
| Gianfranco Zoi | Props |
| Luigi Sergianni | Construction Manager |
| Silvano Miele | Carpenter |
| Winston Ryder | Supervising Sound Editor |
| Silvano Ippoliti | Director of Photography |
| Russell Lloyd | Editor |
| Marisa Centanni | Assistant Hairstylist |
| Placida Crapanzano | Assistant Hairstylist |
| Massimo De Rossi | Assistant Makeup Artist |
| Titi Efrade | Assistant Makeup Artist |
| Anna Graziosi | Assistant Hairstylist |
| Dina Iacobucci | Assistant Hairstylist |
| Enrico Zangarelli | Carpenter |
| Raimondo Spasiano | Carpenter |
| Roberto Manfrini | Props |
| Salvatore Governale | Props |
| Filippo Bugo | Assistant Art Director |
| Piero Ignazio Barbitta | Props |
| Franco Scarano | Sound Engineer |
| Roberto Roncetti | Special Effects Assistant |
| Marcello Coccia | Special Effects |
| Franco Rossellini | Producer |
| Ennio Cascioli | Assistant Hairstylist |
| Franco Rossellini | Post Production Supervisor |
| Archie Ludski | Dialogue Editor |
| Renato Ricci | Special Effects Assistant |
| Andrea Bucci | Special Effects Assistant |
| Franco Celli | Special Effects |
| Andreina Ambrosini | Assistant Makeup Artist |
| Paolo Borselli | Assistant Hairstylist |
| Mario Centofanto | Assistant Hairstylist |
| Alfio Meniconi | Assistant Makeup Artist |
| Agnese Panarotto | Assistant Hairstylist |
| Ettore Tarquini | Assistant Hairstylist |
| Alfredo Tiberi | Assistant Makeup Artist |
| Alessandro Mattei | Production Supervisor |
| Giovanni Michelagnoli | Second Assistant Director |
| Fabrizio Pisaneschi | Second Assistant Director |
| Alfredo Trovalusci | Props |
| Giulio Tamassy | Sculptor |
| Arnaldo Sparapassi | Carpenter |
| Carlo Rissone | Assistant Art Director |
| Americo De Angelis | Props |
| Vito Consoli | Assistant Art Director |
| Giuseppe Banchelli | Makeup Artist |
| Maurizio Bevilacqua | Assistant Makeup Artist |
| Alessandro Jacoponi | Assistant Hairstylist |
| Cinzia Landi | Assistant Makeup Artist |
| Rossana Musitelli | Assistant Makeup Artist |
| Vittorio Fornasiero | Production Supervisor |
| Luigi Attardi | Second Assistant Director |
| Luca Ronchi | Second Assistant Director |
| Celeste Pranzi | Props |
| Sergio Marli | Props |
| Fernando Fortunati | Assistant Art Director |
| Bruno Ferreri | Carpenter |
| Renato Cupito | Carpenter |
| Orlando Araco | Props |
| Antonietta Caputo | Assistant Hairstylist |
| Renato Francola | Assistant Makeup Artist |
| Claudia Giustini | Assistant Makeup Artist |
| Gino Tamagnini | Assistant Makeup Artist |
| Agostino Pisaneschi | Second Assistant Director |
| Angelo Maranno | Props |
| Bruno Lenzi | Assistant Property Master |
| Anna De Angelis | Assistant Art Director |
| Antonio Ciminello | Assistant Art Director |
| Giuseppe Olivetti | Special Effects Assistant |
| Liliane Ceccini | Assistant Hairstylist |
| Giovanni Morosi | Assistant Makeup Artist |
| Guerrino Todero | Assistant Hairstylist |
| Sergio Galiano | Unit Manager |
| Gianpiero Grassi | Property Master |
| Luciano Rossiello | Props |
| Fulvio Gabrielli | Carpenter |
| Aldo Fanari | Carpenter |
| Vincenzo Cancellara | Property Master |
| Joan Baker | Foley Artist |
| Patrick Moore | Assistant Sound Editor |
| Bruno Nicolai | Original Music Composer |
| Danilo Donati | Art Direction |
| Iole Cecchini | Hairstylist |
| Carlo Aprile | Assistant Hairstylist |
| Vittorio Biseo | Assistant Makeup Artist |
| Corrado Blengini | Assistant Makeup Artist |
| Massimo Camilletti | Assistant Makeup Artist |
| Maria Favella | Assistant Hairstylist |
| Bruno Gironi | Assistant Makeup Artist |
| Rosario Prestopino | Assistant Makeup Artist |
| Gabriella Trani | Assistant Makeup Artist |
| Claudio Maielli | Sound Engineer |
| Liliana Dulac | Assistant Makeup Artist |
| Armenio Marroni | Assistant Hairstylist |
| Giuseppe Serpe | Production Supervisor |
| Raffaele Lubrano | Assistant Art Director |
| Omero Bartolini | Assistant Art Director |
| Emanuela Altrieri | Lead Painter |
| Antonio Sisto | Boom Operator |
| Giuliano Paravano | Special Effects Assistant |
| Tinto Brass | Director |
| Jack H. Silverman | Executive Producer |
| Thea Boggiatto | Assistant Makeup Artist |
| Silvana Senzacqua | Assistant Hairstylist |
| Adriana Sforza | Assistant Hairstylist |
| Mauro Tiberi | Assistant Art Director |
| Giuseppe Lubrano | Props |
| Antonio Cocchioni | Sculptor |
| Gregorio Cardane | Props |
| Giovanni Angler | Carpenter |
| Beryl Mortimer | Foley Artist |
| Ted Whitehead | Additional Dialogue |
| Bob Guccione | Producer |
| Giovanni Amedei | Assistant Makeup Artist |
| M. Pia De Biase | Assistant Hairstylist |
| Luisa Garbini | Assistant Hairstylist |
| Mario Basili | Assistant Production Manager |
| Silvano Spoletini | Production Supervisor |
| Giulio Simonetti | Props |
| Vito Rossiello | Greensman |
| Luigi Marchione | Assistant Art Director |
| Iorio Luzzi | Carpenter |
| Antonio Grassi | Props |
| Cesare De Paolis | Carpenter |
| Michelangelo Borca | Props |
| Danilo Donati | Costume Designer |
| Adonella De Rossi | Assistant Makeup Artist |
| Carla Indoni | Assistant Hairstylist |
| Marisa Nannicini | Production Supervisor |
| Piernico Solinas | First Assistant Director |
| Sergio Gatti | Property Master |
| Vittorio Catolli | Assistant Art Director |
| Leslie Hodgson | Sound Editor |
| Roger Van Engel | Sound Editor |
| Bob Guccione | Additional Writing |
| Emilia Iacchini | Assistant Hairstylist |
| Antonio Maltempo | Assistant Makeup Artist |
| Fiorella Petitti | Assistant Hairstylist |
| Alvaro Rossi | Assistant Makeup Artist |
| Emilio Trani | Assistant Makeup Artist |
| Augusto Marabelli | Production Supervisor |
| Giovanni Soldati | Second Assistant Director |
| Filomeno Crisara | Sculptor |
| Antonio Forrest | Sound Engineer |
| Paolo Campagnoli | Special Effects Assistant |
| Luigi Urbani | Set Dresser |
| Mario Di Biase | Production Manager |
| Gore Vidal | Original Story |
| Renzo Rossellini | Original Music Composer |
| Enzo Micarelli | Editor |
| Armando Tortorici | Props |
| Alberto Travaglini | Assistant Makeup Artist |
| Masolino D'Amico | Screenplay |
