Truman Capote

Philip Seymour Hoffman

Truman Capote

Catherine Keener

Harper Lee

Clifton Collins Jr.

Perry Smith

Bruce Greenwood

Jack Dunphy

Bob Balaban

William Shawn

Mark Pellegrino

Dick Hickock

Marshall Bell

Warden Marshall Krutch

Amy Ryan

Marie Dewey

Bess Meyer

Linda Murchak

Chris Cooper

Alvin Dewey

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Allie Mickelson

Laura Kinney

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Craig Archibald

Christopher

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Bronwen Coleman

Barbara

Kate Shindle

Rose

David Wilson Barnes

Grayson

Michael J. Burg

Williams

Kwesi Ameyaw

Porter

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Andrew Farago

Car Rental Agent

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Kelci Stephenson

Nancy Clutter

C. Ernst Harth

Lowell Lee Andrews

Kjartan Hewitt

Danny Burke

Nazariy Demkowicz

Paul Dewey

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Ken Krotowich

Courthouse Guard

R.D. Reid

Roy Church

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Rob McLaughlin

Harold Nye (as Robert McLaughlin)

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Harry Nelken

Sheriff Walter Sanderson

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Jon Ted Wynne

Journalist

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Christopher Read

Journalist

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Jonathan Barrett

Journalist

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Edward Sutton

Old Man

John Warkentin

Warren Hotel Desk Clerk

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Avery Tiplady

Alvin Dewey Jr.

John Destry

Pete Holt

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Araby Lockhart

Dorothy Sanderson

John Maclaren

Judge Roland Tate

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Olie Alto

Franklin Weeks

Adam Kimmel

Richard Avedon

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Jeremy Dangerfield

Jury Foreman

David Rakoff

Ben Baron

Robert Huculak

NY Reporter

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James Durham

Young Prison Guard

Will Woytowich

Cruiser

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Wayne Nicklas

Row Guard

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Jason Love

Row Guard

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Norman Armour

Literary Enthusiast

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Manfred Maretzki

Herb Clutter

Miriam Smith

Bonnie Clutter

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Philip Lockwood

Kenyon Clutter

Marina Stephenson Kerr

Operator (voice)

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Jim Shepard

Chaplain

Tiffany Lyndall-Knight

Gloria Guiness (uncredited)

Michelle Harrison

Babe Paley (uncredited)

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Hedwig Herzog

Sophie Clutter (uncredited)