 | Ernest Borgnine als Marty Piletti |
 | Betsy Blair als Clara Snyder |
 | Esther Minciotti als Mrs. Theresa Piletti |
 | Augusta Ciolli als Aunt Catherine |
 | Joe Mantell als Angie |
 | Karen Steele als Virginia |
 | Jerry Paris als Tommy |
 | James Bell als Mr. Snyder (uncredited) |
 | John Beradino als Man in Bar (uncredited) |
 | Charles Cane als Lou - Bartender (uncredited) |
 | Paddy Chayefsky als Leo (uncredited) |
 | John Dennis als Andy (uncredited) |
 | Walter Kelley als The Kid (uncredited) |
| Doris Kemper als Bit Role (uncredited) |
 | John Milford als (uncredited) |
 | Silvio Minciotti als Butcher (uncredited) |
| Robin Morse als Joe (uncredited) |
| Kathleen Mulqueen als Irish Lady Talking in Bar (uncredited) |
| George Nardelli als Bar Patron (uncredited) |
 | Jerry Orbach als Ballroom Patron (uncredited) |
| Edwin Rochelle als Hotel Clerk (uncredited) |
 | Glenn Strange als Bit Role (uncredited) |
 | Frank Sutton als Ralph (uncredited) |
 | Hal Taggart als Churchgoer Extra (uncredited) |
 | Minerva Urecal als Mrs. Rosari (uncredited) |
| Waclaw Rekwart als Bar Patron (uncredited) |
 | Arthur Tovey als Man on Church Steps (uncredited) |
| Alan Wells als Jerry (uncredited) |
| Burt Lancaster | Producer |
| Paddy Chayefsky | Screenplay |
| Delbert Mann | Director |
| Roger Heman Sr. | Sound Recordist |
| Robert J. Schiffer | Makeup Artist |
| Rudolph Liszt | Makeup Artist |
| Robert G. Carlisle | Sound Effects Editor |
| Roy Webb | Original Music Composer |
| Agnes Flanagan | Hairstylist |
| Betty Pagel | Casting Associate |
| Robert Priestley | Set Decoration |
| Paul Helmick | Assistant Director |
| Norma Koch | Costume Design |
| George Bassman | Additional Music |
| John K. Kean | Sound Recordist |
| Harold Hecht | Producer |
| Paddy Chayefsky | Associate Producer |
| Ted Haworth | Art Direction |
| Joseph LaShelle | Director of Photography |
| Robert G. Carlisle | Music Editor |
| Walter M. Simonds | Art Direction |
| Alan Crosland, Jr. | Editorial Services |
| George Bassman | Conductor |
