cast
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Philip Seymour Hoffman
Truman Capote
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Catherine Keener
Harper Lee
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Clifton Collins Jr.
Perry Smith
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Bruce Greenwood
Jack Dunphy
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Bob Balaban
William Shawn
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Mark Pellegrino
Dick Hickock
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Marshall Bell
Warden Marshall Krutch
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Amy Ryan
Marie Dewey
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Bess Meyer
Linda Murchak
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Chris Cooper
Alvin Dewey
- Allie Mickelson Laura Kinney
- Craig Archibald Christopher
- Bronwen Coleman Barbara
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Kate Shindle
Rose
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David Wilson Barnes
Grayson
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Michael J. Burg
Williams
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Kwesi Ameyaw
Porter
- Andrew Farago Car Rental Agent
- Kelci Stephenson Nancy Clutter
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C. Ernst Harth
Lowell Lee Andrews
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Kjartan Hewitt
Danny Burke
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Nazariy Demkowicz
Paul Dewey
- Ken Krotowich Courthouse Guard
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R.D. Reid
Roy Church
- Rob McLaughlin Harold Nye (as Robert McLaughlin)
- Harry Nelken Sheriff Walter Sanderson
- Jon Ted Wynne Journalist
- Christopher Read Journalist
- Jonathan Barrett Journalist
- Edward Sutton Old Man
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John Warkentin
Warren Hotel Desk Clerk
- Avery Tiplady Alvin Dewey Jr.
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John Destry
Pete Holt
- Araby Lockhart Dorothy Sanderson
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John Maclaren
Judge Roland Tate
- Olie Alto Franklin Weeks
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Adam Kimmel
Richard Avedon
- Jeremy Dangerfield Jury Foreman
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David Rakoff
Ben Baron
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Robert Huculak
NY Reporter
- James Durham Young Prison Guard
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Will Woytowich
Cruiser
- Wayne Nicklas Row Guard
- Jason Love Row Guard
- Norman Armour Literary Enthusiast
- Manfred Maretzki Herb Clutter
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Miriam Smith
Bonnie Clutter
- Philip Lockwood Kenyon Clutter
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Marina Stephenson Kerr
Operator (voice)
- Jim Shepard Chaplain
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Tiffany Lyndall-Knight
Gloria Guiness (uncredited)
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Michelle Harrison
Babe Paley (uncredited)
- Hedwig Herzog Sophie Clutter (uncredited)