Frank Langella
— Harry Crystal
Glynnis O'Connor
— Ramona
Tom Hulce
— Artie Shoemaker
Jerry Stiller
— Mr. Shoemaker
Herbert Berghof
— Dr. Julius Fuldauer
Kevin McCarthy
— Mickey Bellinger
Joseph Maher
— Fibby Geyer
George Morfogen
— Sherman Sprat
Marshall Colt
— Cooky
Anthony Mannino
— D'Angeli
Rose Arrick
— Mrs. Shoemaker
William Robertson
— Mr. Henry
Randy Stumpf
— Loomis
Mark Keyloun
— Hlavacek
Mary Cadorette
— Dancer (uncredited)