Jack Nicholson

Randle Patrick McMurphy

Brad Dourif

Billy Bibbit

Louise Fletcher

Nurse Mildred Ratched

Danny DeVito

Martini

William Redfield

Dale Harding

Scatman Crothers

Orderly Turkle

Christopher Lloyd

Max Taber

Will Sampson

Chief Bromden

Dean R. Brooks

Dr. John Spivey

Michael Berryman

Ellis

Sydney Lassick

Charlie Cheswick

William Duell

Jim Sefelt

Vincent Schiavelli

Bruce Fredrickson

Peter Brocco

Col. Matterson

Alonzo Brown

Miller

Mwako Cumbuka

Warren

Josip Elic

Bancini

Ken Kenny

Beans Garfield

Nathan George

Washington

Ted Markland

Hap Arlich

Louisa Moritz

Rose

Mews Small

Candy

Delos V. Smith Jr.

Scanlon

Lan Fendors

Nurse Itsu

Mimi Sarkisian

Nurse Pilbow

Mel Lambert

Harbor Master

Kay Lee

Night Supervisor

Dwight Marfield

Ellsworth

Tin Welch

Ruckley

Philip Roth

Woolsey

Aurore Clément

Lady on Pier (uncredited)

Anjelica Huston

Woman in Crowd on Pier (uncredited)

Audrey Landers

Actress on TV Screen (uncredited)

Saul Zaentz

Captain on Shore (uncredited)