托比·琼斯
Toby Jones
饰：杜鲁门·卡波特 Truman Capote
桑德拉·布洛克
Sandra Bullock
饰：哈珀·李 Nelle Harper Lee
西格妮·韦弗
Sigourney Weaver
饰：贝比·帕利 Babe Paley
李·佩斯
Lee Pace
饰：迪克 Dick Hickock
丹尼尔·克雷格
Daniel Craig
饰：佩里·史密斯 Perry Smith
霍普·戴维斯
Hope Davis
饰：Slim Keith
格温妮斯·帕特洛
Gwyneth Paltrow
饰：Kitty Dean
迈克尔·潘斯
Michael Panes
饰：Gore Vidal
Frank G. Curcio
饰：William Shawn (as Frank Curcio)
伊莎贝拉·罗塞里尼
Isabella Rossellini
饰：Marella Agnelli
约翰·本杰明·海基
John Benjamin Hickey
饰：Jack Dunphy
彼得·博格丹诺维奇
Peter Bogdanovich
饰：Bennett Cerf
Mitch Baker
Mitch Baker
饰：Reporter 1
格兰特·詹姆斯
Grant James
饰：Reporter 2
杰夫·丹尼尔斯
Jeff Daniels
饰：Alvin Dewey
马可·佩雷拉
Marco Perella
饰：Clifford Hope
Terri Zee
Terri Zee
饰：Nancy Hickey
Brian Shoop
饰：Everett Ogburn
Brett Brock
Brett Brock
饰：Tex Smith
Brady Coleman
饰：Charles McAtee
Lee Ritchey
饰：Bill Paley
布雷迪·亨德尔
Brady Hender
饰：Young Perry
Brent McCoy
Brent McCoy
饰：Herb Clutter
盖尔·克罗纳奥尔
Gail Cronauer
饰：Bonnie Clutter
Leticia Trejo
饰：Flo Smith
Mark Rubin
饰：El Morocco Band
Steve Schwelling
Steve Schwelling
饰：El Morocco Band
Glover Johns Gill
Glover Johns Gill
饰：El Morocco Band
Rey Arteaga
Rey Arteaga
饰：El Morocco Band
Justin Sherburn
Justin Sherburn
饰：El Morocco Band
Andrew Halbreich
Andrew Halbreich
饰：El Morocco Band
Terri Bennett
Terri Bennett
饰：D.A.'s Secretary
Bethlyn Gerard
Bethlyn Gerard
饰：Marie Dewey
Marian Aleta Jones
Marian Aleta Jones
饰：Ellen Bechner
Ray Gestaut
Ray Gestaut
饰：Lee Andrews
Joe Cordi
Joe Cordi
饰：Piano Player
Zachary Burnett
Zachary Burnett
饰：Young Truman
Charles Mooneyhan
Charles Mooneyhan
饰：Prison Guard 1
Dean Reading
饰：Deputy Bishop (uncredited)
彼得·康威尔
Peter Cornwell
饰：Restaurant Patron (uncredited)
Angela Ware
Angela Ware
饰：Restaurant patron (uncredited)
Michael D. Conway
Michael D. Conway
饰：Doctor (as Michael Conway)
J.D. Young
饰：Prison Guard 2
丹尼斯莱茨
Dennis Letts
饰：Judge Tate
茱丽叶特·斯蒂文森
Juliet Stevenson
饰：Diana Vreeland
Heath Allyn
饰：New Yorker (uncredited)
理查德·迪拉德
Richard Dillard
饰：Man on Street
Sheila Bailey
饰：Waitress (as Sheila Bailey-Lucas)
加布里埃尔·福尔斯
Gabriel Folse
饰：Foreman
Norman Bennett
Norman Bennett
饰：Desk Clerk (as Norman Jamison Bennett)
理查德·琼斯
Richard Jones
饰：Andy Erhart
Steve Flanagin
饰：Chaplain
图克·皮普肯
Turk Pipkin
饰：Prisoner 2
Paul Wright
Paul Wright
饰：Prisoner 1 (as Paul Mitchell Wright)
Morgan Farris
饰：Nancy Clutter
Austin Chittim
Austin Chittim
饰：Kenyon Clutter
Joey Basham
Joey Basham
饰：Paul Dewey
利比·维拉利
Libby Villari
饰：Delores Hope
Terri Merritt Bennett
饰：D.A.'s Secretary,(as Terri Bennett)
Brent A. McCoy
饰：Herb Clutter,(as Brent Mccoy)