| Laurence Olivier | Loren Hardeman, Sr. |
| Robert Duvall | Loren Hardeman III |
| Katharine Ross | Sally Hardeman |
| Tommy Lee Jones | Angelo Perino |
| Jane Alexander | Alicia Hardeman |
| Lesley-Anne Down | Lady Bobby Ayres |
| Joseph Wiseman | Jake Weinstein |
| Kathleen Beller | Betsy Hardeman |
| Edward Herrmann | Dan Weyman |
| Paul Rudd | Loren Hardeman, Jr. |
| Roy Poole | John Duncan |
| Richard Venture | Mark Sampson |
| Titos Vandis | Angelo Luigi Perino |
| Clifford David | Joe Warren |
| Inga Swenson | Mrs. Craddock |
| Carol Williard | Roxanne |
| Charlie Fields | Loren III as a Boy |
| Whitney Blake | Elizabeth Hardeman |
| William Cain | Butler |
| Fred Carney | Boardmember #2 |
| Maury Cooper | Boardmember #3 |
| Norman Palmer | Boardmember #1 |
| Mary Petrie | Nurse |
| Russell Porter | Boardmember #4 |
| William Roerick | Secretary of Commerce |
| Reed Morgan | Donald |
Technical Credits
| Daniel Petrie | Director |
| Lee Alexander | Sound/Sound Designer |
| John Barry | Score Composer |
| William Bast | Screenwriter |
| Walter Bernstein | Screenwriter |
| Herman A. Blumenthal | Production Designer |
| Wolfgang Glattes | Asst. Director |
| Jack Grossberg | Associate Producer |
| Dorothy Jeakins | Costumes/Costume Designer |
| James W. Payne | Set Decoration/Design |
| Harold Robbins | Producer |
| Rita Roland | Editor |
| Mario Tosi | Cinematographer |
| Robert Weston | Producer |