|
| Marlon Brando | ... | Don Vito Corleone |
| Al Pacino | ... | Michael Corleone |
| James Caan | ... | Santino 'Sonny' Corleone |
| Richard S. ellano | ... | Peter Clemenza (as Richard ellano) |
| 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) |
| 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) |
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