Laura Kinney
Nancy Clutter
Truman Capote
Christopher
Barbara
Rose
Grayson
Williams (as Michael J. Berg)
Nelle Harper Lee
Porter
Car Rental Agent
Courthouse Guard
Alvin Dewey
Roy Church
Harold Nye (as Robert McLaughlin)
Sheriff Walter Sanderson
Journalist
Old Man
Girl
Danny Burke (as Kerr Hewitt)
Jack Dunphy
Warren Hotel Desk Clerk
Marie Dewey
Alvin Dewey Jr.
Paul Dewey
Pete Holt
Perry Smith
Dick Hickock
Dorothy Sanderson
Judge Roland Tate
Franklin Weeks
William Shawn
Richard Avedon
Jury Foreman
Ben Baron
NY Reporter
Young Prison Guard
Warden Marshall Krutch
Prison Guard
ND Prison Guard
Cruiser
Lowell Lee Andrews
Row Guard
Literary Enthusiast
Linda Murchak
Herb Clutter
Bonnie Clutter
Kenyon Clutter
Operator (voice)
Chaplain
Kansas State Patrol (uncredited)
Jack's Party Guest (uncredited)
Cast Extra (uncredited)
Court Marshall (uncredited)
Young School Teacher (uncredited)
Party Date (uncredited)
New York Literatus (uncredited)
Young Assistant (uncredited)
Porter (uncredited)
Reporter (uncredited)
Babe Paley (uncredited)
Woman at Party (uncredited)
Sophie Clutter (uncredited)
Man in Courtroom (uncredited)
New York Literary Party Guest (uncredited)
Gloria Guiness (uncredited)
Kansas Citizen (uncredited)
Book Reading Attendee (uncredited)
Woman at party (uncredited)
Extra (uncredited)
Limo Driver (uncredited)