| 角色 | 饰演者 | 角色介绍 |
| Don Vito Corleone | 马龙·白兰度 | |
| Michael Corleone | 阿尔·帕西诺 | |
| Santino 'Sonny' Corleone | 詹姆斯·凯恩 | |
| Tom Hagen | 罗伯特·杜瓦尔 | |
| Virgil 'The Turk' Sollozzo | 艾尔·勒提埃里 | |
| Kay Adams | 黛安·基顿 | |
| Connie Corleone Rizzi | 塔莉娅·夏尔 | |
| Fredo Corleone | 约翰·凯泽尔 | |
| Moe Greene | 阿历克斯·罗克 | |
| Michael Francis Rizzi (uncredited) | 索菲亚·科波拉 | |
| Willie Cicci (uncredited) | 乔·斯皮内尔 | |
| Pete Clemenza (as Richard Castellano) | 理查德·S·卡斯特拉诺 | |
| Capt. Mark McCluskey | 斯特林·海登 | |
| Jack Woltz | 约翰·马利 | |
| Emilio Barzini | 理查德·康特 | |
| Salvatore "Sally" Tessio | Abe Vigoda | |
| Carlo Rizzi | Gianni Russo | |
| Carmine Cuneo | Rudy Bond | |
| Johnny Fontane | 阿尔·马蒂诺 | |
| Mama Corleone | Morgana King | |
| Luca Brasi | Lenny Montana | |
| Paulie Gatto | John Martino | |
| Amerigo Bonasera | Salvatore Corsitto | |
| Al Neri | Richard Bright | |
| Bruno Tattaglia | Tony Giorgio | |
| Nazorine | Vito Scotti | |
| Theresa Hagen | Tere Livrano | |
| Philip Tattaglia | Victor Rendina | |
| Lucy Mancini | Jeannie Linero | |
| Sandra Corleone | Julie Gregg | |
| Mrs. Clemenza | Ardell Sheridan | |
| Apollonia Vitelli-Corleone | Simonetta Stefanelli | |
| Fabrizio | Angelo Infanti | |
| Don Tommasino | Corrado Gaipa | |
| Calo | Franco Citti | |
| Vitelli | 萨罗·乌尔济 |
