Faye Dunaway
— Maggie
Christopher Plummer
— Quentin
Bibi Andersson
— Holga
Mariclare Costello
— Louise
Murray Hamilton
— Mickey
Nancy Marchand
— Rose, Quentin's Mother
Addison Powell
— Quentin's Father
Lee Richardson
— Lou
Jennifer Warren
— Elsie
Robert Blackburn
— Harley Barnes
Max Brandt
— German Professor
Edward Dunn
— Lucas
Dorothi Fox
— Carrie
Michael Miller
— Dan
Albert M. Ottenheimer
— Chairman
Roger Serbagi
— First Man
Brooke Shields
— Quentin's Daughter
Joseph Bergmann
— Record Executive