Philip Seymour Hoffman (Truman Capote)
Catherine Keener (Nelle Harper Lee)
Clifton Collins, Jr. (Perry Smith)
Chris Cooper (Alvin Dewey)
Bruce Greenwood (Jack Dunphy)
Allie Mickelson (Laura Kinney)
Araby Lockhart (Dorothy Sanderson)
Robert McLaughlin (Harold Nye)
Kerr Hewitt (Danny Burke)
Jeremy Dangerfield (Jury Foreman)
Kwesi Ameyaw (Porter)
John B. Destry (Pete Holt)
Bob Huculak (New York Reporter)
Adam Kimmel (Richard Avedon)
R.D. Reid (Roy Church)
C. Ernst Harth (Lowell Lee Andrews)
Harry Nelken (Sheriff Walter Sanderson)
John MacLaren (Judge Roland Tate)
Jim Shepard (Chaplain)
Marshall Bell (Warden Marshall Krutch)
Bob Balaban (William Shawn)
Amy Ryan (Mary Dewey)
Mark Pellegrino (Dick Hickock)