Mel Edison
Jack Lemmon
Edna Edison
Anne Bancroft
Woman Upstairs
Patricia Marshall
Helen
Dee Carroll
Unemployment Clerk
Ketty Lester
Doorman
M. Emmet Walsh
Taxi Driver
F. Murray Abraham
Mr. Cooperman
James McCallion
Bus Driver
Fat Thomas
Elevator Passenger
Arlen Stuart
Youth in Park
Sylvester Stallone
Wayne Morgan
Alan DeWitt
Harry Edison
Gene Saks
Man with Dog
Harry Ray
Man on Street (uncredited)
Lonnie Burr
Elevator Passenger (uncredited)
Eddie Garrett
NYU Student (uncredited)
Ben Lautman
Radio Newscaster (voice) (uncredited)
Dave Michaels
Gary Owens
John Ritter
Subway Passenger (uncredited)
Cosmo Sardo
Norman Stevans
Man Upstairs (voice) (uncredited)
Joe Turkel
Pauline
Elizabeth Wilson
Pearl
Florence Stanley
Belle
Maxine Stuart
Man Upstairs
Ed Peck
Charlie
Gene Blakely
Psychiatrist
Ivor Francis
Detective
Stack Pierce
Costume Design
Joel Schumacher
Dialogue Editor
Billy Mauch
Theatre Play
Neil Simon
Screenplay
Producer
Melvin Frank
Director
Original Music Composer
Marvin Hamlisch
Sound Effects Editor
Billie Owens
Arthur H. Pullen
Set Decoration
Marvin March
Ed Scheid
John O. Young
Sound Editor
Randy Nite
Key Grip
Carl Manoogian
Musician
Pete Candoli
Other
Arnold Saint Subber
Second Assistant Director
Bruce Satterlee
Boom Operator
Arthur Bloom
First Assistant Director
Howard Roessel
Music Editor
Donald Harris
Wardrobe Supervisor
Michael J. Harte
Unit Production Manager
Hal Klein
Sound Mixer
Jack C. Jacobsen
Script Supervisor
Hope Williams
Construction Coordinator
Gene Lauritzen
Production Illustrator
Mentor Huebner
Camera Operator
Lou Barlia
Assistant Camera
Vinnie Gerardo
Property Master
Dennis J. Parrish
Sound
Tex Rudloff
Sound Recordist
James Perdue
Dialogue Coach
Director of Photography
Philip H. Lathrop
Al Overton
Thalia Phillips
Tommy Tedesco
Editor
Bob Wyman
Makeup Artist
Hairdresser
Sherry Wilson
Art Direction
E. Preston Ames
Fred Williams