Toby Jones as Truman Capote

Sandra Bullock as Nelle Harper Lee

Daniel Craig as Perry Smith

Peter Bogdanovich as Bennett Cerf

Jeff Daniels as Alvin Dewey

Hope Davis as Slim Keith

Gwyneth Paltrow as Kitty Dean

Isabella Rossellini as Marella Agnelli

Juliet Stevenson as Diana Vreeland

Sigourney Weaver as Babe Paley

John Benjamin Hickey as Jack Dunphy

Lee Pace as Dick Hickock

Rey Arteaga as El Morocco Band

Justin Sherburn as El Morocco Band

Andrew Halbreich as El Morocco Band

Michael Panes as Gore Vidal

Frank G. Curcio as William Shawn

Terri Merritt Bennett as D.A.'s Secretary

Mitch Baker as Reporter 1

Grant James as Reporter 2

Sheila Bailey as Waitress

Richard Dillard as Man on Street

Norman Bennett as Desk Clerk

Marco Perella as Clifford Hope

Bethlyn Gerard as Marie Dewey

Libby Villari as Delores Hope

Joey Basham as Paul Dewey

Marian Aleta Jones as Ellen Bechner

Terri Zee as Nancy Hickey

Richard Andrew Jones as Andy Erhart

Brian Shoop as Everett Ogburn

Brady Coleman as Charles McAtee

Paul Wright as Prisoner 1

Turk Pipkin as Prisoner 2

Ray Gestaut as Lee Andrews

Joe Cordi as Piano Player

Lee Ritchey as Bill Paley

Brett Brock as Tex Smith

Leticia Trejo as Flo Smith

Brady Hender as Young Perry

Zachary Burnett as Young Truman

Brent A. McCoy as Herb Clutter

Gail Cronauer as Bonnie Clutter

Austin Chittim as Kenyon Clutter

Morgan Farris as Nancy Clutter

Dennis Letts as Judge Tate

Gabriel Folse as Foreman

Charles Mooneyhan as Prison Guard 1

J.D. Young as Prison Guard 2

Steve Flanagin as Chaplain

Michael D. Conway as Doctor