 Jack LemmonMel Edison | Mel Edison |
 Anne BancroftEdna Edison | Edna Edison |
 Gene SaksHarry Edison | Harry Edison |
 Elizabeth WilsonPauline | Pauline |
 Florence StanleyPearl | Pearl |
 Maxine StuartBelle | Belle |
 Ed PeckMan Upstairs | Man Upstairs |
 Gene BlakelyCharlie | Charlie |
 Ivor FrancisPsychiatrist | Psychiatrist |
 Stack PierceDetective | Detective |
 Patricia MarshallWoman Upstairs | Woman Upstairs |
| DDee CarrollHelen | Helen |
 Ketty LesterUnemployment Clerk | Unemployment Clerk |
 M. Emmet WalshDoorman | Doorman |
 F. Murray AbrahamTaxi Driver | Taxi Driver |
 James McCallionMr. Cooperman | Mr. Cooperman |
| FFat ThomasBus Driver | Bus Driver |
 Arlen StuartElevator Passenger | Elevator Passenger |
 Sylvester StalloneYouth in Park | Youth in Park |
| AAlan DeWittWayne Morgan | Wayne Morgan |
| HHarry RayMan with Dog | Man with Dog |
| LLonnie BurrMan on Street (uncredited) | Man on Street (uncredited) |
| EEddie GarrettElevator Passenger (uncredited) | Elevator Passenger (uncredited) |
| BBen LautmanNYU Student (uncredited) | NYU Student (uncredited) |
| DDave MichaelsRadio Newscaster (voice) (uncredited) | Radio Newscaster (voice) (uncredited) |
 Gary OwensRadio Newscaster (voice) (uncredited) | Radio Newscaster (voice) (uncredited) |
 John RitterElevator Passenger (uncredited) | Elevator Passenger (uncredited) |
 Cosmo SardoSubway Passenger (uncredited) | Subway Passenger (uncredited) |
| NNorman StevansElevator Passenger (uncredited) | Elevator Passenger (uncredited) |
 Joe TurkelMan Upstairs (voice) (uncredited) | Man Upstairs (voice) (uncredited) |
