Gene Wilder
— Harry Evers
Bob Newhart
— Marvin Ellison
Ellen Burstyn
— Lynne Evers
Cloris Leachman
— Lois Ellison
Martha Scott
— Mrs. Reynolds
Nancy Walker
— Mrs. Bender
Valerie Harper
— Ann Menzente
Rob Reiner
— Joel Forrest
Norman Fell
— Melvin Leonard
Gino Conforti
— Mike
Richard Schaal
— Bob
Robert Sampson
— Dave
Richard Gautier
— John
Jean-Michel Michenaud
— David Evers (as Gerald Michenaud)
John Archer
— Mr. Wood
Jonathan Kidd
— Waiter
Barbara Barnett
— Secretary
Jed Allan
— Dick
William Callaway
— Cabbie
Sidney Clute
— Camp Director
Chris Sarandon
— Counselor
Charles Shull
— Announcer
Carol Worthington
— Contestant
Ric Mancini
— Bartender
Loyd Catlett
— Camp Counselor
Ben Lautman
— New Yorker