Jack Lemmon
Mel Edison
Anne Bancroft
Edna Edison
Gene Saks
Harry Edison
Elizabeth Wilson
Pauline
Florence Stanley
Pearl
Maxine Stuart
Belle
Ed Peck
Man Upstairs
Gene Blakely
Charlie
Ivor Francis
Psychiatrist
Stack Pierce
Detective
Patricia Marshall
Woman Upstairs
Dee Carroll
Helen
Ketty Lester
Unemployment Clerk
M. Emmet Walsh
Doorman
F. Murray Abraham
Taxi Driver
James McCallion
Mr. Cooperman
Fat Thomas
Bus Driver
Arlen Stuart
Elevator Passenger
Sylvester Stallone
Youth in Park
Alan DeWitt
Wayne Morgan
Harry Ray
Man with Dog
Lonnie Burr
Man on Street (uncredited)
Eddie Garrett
Elevator Passenger (uncredited)
Ben Lautman
NYU Student (uncredited)
Dave Michaels
Radio Newscaster (voice) (uncredited)
Gary Owens
Radio Newscaster (voice) (uncredited)
John Ritter
Elevator Passenger (uncredited)
Cosmo Sardo
Subway Passenger (uncredited)
Norman Stevans
Elevator Passenger (uncredited)
Joe Turkel
Man Upstairs (voice) (uncredited)