 | Marlon Brando | .... | Don Vito Corleone |
 | Al Pacino | .... | Michael Corleone |
 | James Caan | .... | Santino 'Sonny' Corleone |
 | Richard Castellano | .... | Peter Clemenza |
 | Robert Duvall | .... | Tom Hagen |
 | Sterling Hayden | .... | Capt. McCluskey |
 | John Marley | .... | Jack Woltz |
 | Richard Conte | .... | Don Emilio Barzini |
 | Al Lettieri | .... | Virgil 'The Turk' Sollozzo |
 | Diane Keaton | .... | Kay Adams |
 | Abe Vigoda | .... | Sal Tessio |
 | Talia Shire | .... | Connie Corleone Rizzi |
 | Gianni Russo | .... | Carlo Rizzi |
 | John Cazale | .... | Fredo Corleone |
 | Rudy Bond | .... | Don Carmine Cuneo |
 | Al Martino | .... | Johnny Fontane |
 | Morgana King | .... | Mama Corleone |
 | Lenny Montana | .... | Luca Brasi |
 | John Martino | .... | Paulie Gatto |
 | Salvatore Corsitto | .... | Bonasera |
 | Richard Bright | .... | Al Neri |
 | Alex Rocco | .... | Moe Greene |
 | Tony Giorgio | .... | Bruno Tattaglia |
 | Vito Scotti | .... | Nazorine |
 | Tere Livrano | .... | Theresa Hagen |
 | Victor Rendina | .... | Don Philip Tattaglia |
 | Jeannie Linero | .... | Lucy Mancini |
 | Julie Gregg | .... | Sandra Corleone |
 | Ardell Sheridan | .... | Mrs. Clemenza |
 | Simonetta Stefanelli | .... | Apollonia Vitelli Corleone |
 | Angelo Infanti | .... | Fabrizio |
 | Corrado Gaipa | .... | Don Tommasino |
 | Franco Citti | .... | Calo |
 | Saro Urzì | .... | Vitelli |
 | Max Brandt | .... | Extra in Furniture-Moving Scene (uncredited) |
 | Tybee Brascia | .... | Dancer in wedding scene (uncredited) |
 | Carmine Coppola | .... | Piano Player in Montage (uncredited) |
 | Gian-Carlo Coppola | .... | Baptism Observer (uncredited) |
 | Italia Coppola | .... | Extra (uncredited) |
 | Roman Coppola | .... | Boy on Street Who Attended Funeral (uncredited) |
 | Sofia Coppola | .... | Michael Francis Rizzi (uncredited) |
 | Don Costello | .... | Don Victor Stracci (uncredited) |
 | Gray Frederickson | .... | Cowboy on the Set at Woltz's Studio (uncredited) |
 | Ron Gilbert | .... | Usher in Bridal Party (uncredited) |
 | Anthony Gounaris | .... | Anthony Vito Corleone (uncredited) |
 | Joe Lo Grippo | .... | Sonny's Bodyguard (uncredited) |
 | Sonny Grosso | .... | Cop outside Hospital (uncredited) |
 | Louis Guss | .... | Don Zaluchi (uncredited) |
 | Merril E. Joels | .... | Toll Both Collector (uncredited) |
 | Randy Jurgensen | .... | Sonny's Killer #1 (uncredited) |
 | Peter Lemongello | .... | Singer (uncredited) |
 | Tony Lip | .... | Wedding Guest (uncredited) |
 | Frank Macetta | .... | (uncredited) |
 | Lou Martini, jr. | .... | Boy at Wedding (uncredited) |
 | Father Joseph Medeglia | .... | Priest at Baptism (uncredited) |
 | Carol Morley | .... | Night Nurse (uncredited) |
 | Rick Petrucelli | .... | Man in Passenger Seat (uncredited) |
 | Burt Richards | .... | Floral Designer (uncredited) |
 | Sal Richards | .... | Drunk (uncredited) |
 | Tom Rosqui | .... | Rocco Lampone (uncredited) |
 | Nino Ruggeri | .... | Mobster at Funeral with Barzini (uncredited) |
 | Frank Sivero | .... | Street Extra (uncredited) |
 | Filomena Spagnuolo | .... | Extra in Wedding Scene (uncredited) |
 | Joe Spinell | .... | Willi Cicci (uncredited) |
 | Gabriele Torrei | .... | Enzo the Baker (uncredited) |
 | Nick Vallelonga | .... | Wedding Party Guest (uncredited) |
 | Ed Vantura | .... | Wedding Guest (uncredited) |
 | Matthew Vlahakis | .... | Clemenza's Son (uncredited) |