Sisters

Margot Kidder

Danielle Breton / Dominique Blanchion

Jennifer Salt

Grace Collier

Charles Durning

Joseph Larch

William Finley

Emil Breton

Lisle Wilson

Phillip Woode

Barnard Hughes

Arthur McLennen

Mary Davenport

Mrs. Collier

Dolph Sweet

Detective Kelly

Olympia Dukakis

Louise Wilanski

Catherine Gaffigan

Arlene

Bobby C. Collins

Cathy Berry

Lobster child (uncredited)

Art Evans

African Room Waiter (uncredited)

Justine Johnston

Elaine D'Anna (uncredited)

James Mapes

Guard (uncredited)

Laun Maurer

Druggist (uncredited)

Bob Melvin

Extra (uncredited)

Burt Richards

Hospital Attendant (uncredited)