Jill Clayburgh as Erica Benton

Alan Bates as Saul Kaplan

Michael Murphy as Martin Benton

Cliff Gorman as Charlie

Kelly Bishop as Elaine Liebowitz

Lisa Lucas as Patti Benton

Linda Miller as Jeannette

Patricia Quinn as Sue

Andrew Duncan as Bob

Daniel Seltzer as Dr. Arthur Jacobs

Matthew Arkin as Phil

Penelope Russianoff as Dr. Tanya Berkel

Novella Nelson as Jean

Raymond J. Barry as Edward

Ivan Karp as Herb Rowan

Jill Eikenberry as Claire

Michael Tucker as Fred

Chico Martínez as Cabbie

Clint Chin as Chinese Waiter

Ken Chapin as Man at Bar

Tom Elios as Ice Vendor

Karen Ford as Executive Secretary

Alice J. Kane as Waitress

Paul Mazursky as Hal

Pamela Meunier as Hat-Check Girl

Donna Perich as Sophie

Vincent Schiavelli as Man at Party

John Stravinsky as Bartender

Ultra Violet as Lady MacBeth

David Rasche as Man who says, "Hello" (uncredited)