 | Gene Wilder als Stanley |
 | Zero Mostel als John |
 | Karen Black als Daisy |
 | Joe Silver als Norman |
 | Robert Weil als Carl |
 | Marilyn Chris als Mrs. Bingham |
 | Percy Rodriguez als Mr. Nicholson |
 | Robert Fields als Young Man |
| Melody Santangello als Young Woman |
 | Don Calfa als Waiter |
 | Lou Cutell als Cashier |
 | Howard Morton als Doctor |
| Manuel Aviles als Busboy |
 | Anne Ramsey als Lady with Cat |
 | Lorna Thayer als Restaurant Owner |
 | Sheryl Deauville als Woman in Black with Baby Carriage (uncredited) |
| Tom O'Horgan | Director |
| Julian Barry | Screenplay |
| Norman Rockett | Set Decoration |
| Jack Petty | Makeup Artist |
| Robert Enrietto | Assistant Director |
| Noel Taylor | Costume Design |
| Charles L. Campbell | Supervising Sound Editor |
| Galt MacDermot | Music |
| Jesse Wayne | Stunts |
| Robert A. Goldston | Supervising Producer |
| Darrell Silvera | Set Decoration |
| Dee-Dee Petty | Hairstylist |
| Roger Sword | Sound Editor |
| Edward Lewis | Executive Producer |
| Robert Knudson | Sound Mixer |
| Richard Overton | Sound Mixer |
| Henry T. Weinstein | Executive Producer |
| R. Robert Rosenbaum | Assistant Director |
| Ely A. Landau | Producer |
| Hugh K. Gagnier | Camera Operator |
| Tim Griffith | Gaffer |
| Lynn Stalmaster | Casting |
| Jack Martin Smith | Production Design |
| James Crabe | Director of Photography |
| Bud S. Smith | Editor |
| Bob Dawson | Special Effects |
| Mort Abrahams | Executive Producer |
| Irving Temaner | Production Supervisor |
| Douglas Stubbs | Property Master |
| John Murray | Key Grip |
| Robert Marta | Assistant Camera |
| Marcia Reed | Still Photographer |
| Ross Levy | Assistant Editor |
| Eugène Ionesco | Theatre Play |
