Kevin Costner

Character: Kenneth O'Donnell

Bruce Greenwood

Character: John F. Kennedy

Steven Culp

Character: Robert F. Kennedy

Dylan Baker

Character: Robert McNamara

Michael Fairman

Character: Adlai Stevenson

Henry Strozier

Character: Dean Rusk

Frank Wood

Character: McGeorge Bundy

Kevin Conway

Character: Gen. Curtis LeMay

Tim Kelleher

Character: Ted Sorensen

Len Cariou

Character: Dean Acheson

Bill Smitrovich

Character: Gen. Maxwell Taylor

Shawn Driscoll

Character: U-2 Pilot

Drake Cook

Character: Mark O'Donnell

Stephanie Romanov

Character: Jacqueline Kennedy

Lucinda Jenney

Character: Helen O'Donnell

Caitlin Wachs

Character: Kathy O'Donnell

Jon Foster

Character: Kenny O'Donnell, Jr.

Matthew Dunn

Character: Kevin O'Donnell

Kevin O'Donnell

Character: NPIC Photo Interpreter

Janet Coleman

Character: Evelyn Lincoln

Bruce Thomas

Character: Floyd

Dakin Matthews

Character: Arthur Lundahl

Liz Sinclair

Character: Kenny's Assistant #1

Colette O'Connell

Character: Kenny's Assistant #2

Karen Ludwig

Character: Operator Margaret

Audrey Rapoport

Character: White House Operator #1

Marliese Schneider

Character: White House Operator #2

Ed Lauter

Character: Gen. Marshall Carter

Walter Adrian

Character: Lyndon Johnson

James Karen

Character: George Ball

Dan Ziskie

Character: Gen. Walter 'Cam' Sweeney

Peter White

Character: John McCone

Kelly Connell

Character: Pierre Salinger

Olek Krupa

Character: Andrei Gromyko

Ilya Baskin

Character: Anotoly Dobrinyn

Timothy Jerome

Character: Journalist

Jack McGee

Character: Richard J. Daley

Lamar Smith

Character: Aide

John Aylward

Character: Orville Dryfoos

Madison Mason

Character: Adm. George Anderson

Vivien Straus

Character: White House Aide

Christopher Lawford

Character: Cmdr. William B. Ecker

David O'Donnell

Character: Lt. Bruce Wilhemy

Gene Del Bianco

Character: Petty Officer

Benjamin Koldyke

Character: RF-8 Pilot

Daniel Vergara

Character: OAS Secretary General José A. Mora

Ruben Moreno

Character: Argentine Diplomat

Thomas Roberts

Character: Sonar Operator

Sean Bergin

Character: Chief Sonarman

Alan Francis Sullivan

Character: Executive Officer of USS Pierce

Robert Munstis

Character: Radio Room Operator #1

Michael Gaston

Character: Captain of USS Pierce

Joseph Repoff

Character: Radio Room Operator #2

J. Tucker Smith

Character: Captain of USS Kennedy

Chris Henry Coffey

Character: Officer of Destroyer

Oleg Vidov

Character: Valerian Zorin

Radu Gavor

Character: Romanian Delegate

Zitto Kazann

Character: Chilean Delegate

Alex Veadov

Character: Radio Room Operator #3

Jack Blessing

Character: John Scali

Tom Everett

Character: Walter Sheridan

Karl Makinen

Character: Young FBI Agent

Boris Lee Krutonog

Character: Alexander Fomin

Charles Esten

Character: Maj. Rudolf Anderson

Charles Barrett

Character: Air Force NCO

Darryl Smith

Character: Football Coach

Allan Graf

Character: Football Referee

Robert Miranda

Character: RFK's Driver

Todd Sible

Character: RFK's Staffer

Marya Kazakova

Character: Soviet Woman

Cliff Fleming

Character: Aerial Coordinator

Craig Hosking

Character: Pilot

Michael R. Bowman

Character: Aide to JFK (uncredited)

Greg Bronson

Character: Secret Service Agent (uncredited)

Walter Cronkite

Character: Self (archive footage) (uncredited)

Ryder Davis

Character: Boy Scout (uncredited)

Roger Ferreira

Character: Army Lieutenant General (uncredited)

Armen Garo

Character: Crewman on Freighter (uncredited)

Gilley Grey

Character: Air Force Pilot (uncredited)

Phil Hawn

Character: UN Administrator (uncredited)

Rick Kain

Character: Carpenter (uncredited)

John F. Kennedy

Character: Self (voice) (archive footage) (uncredited)

Steven Koller

Character: White House Staff (uncredited)

Pramod Kumar

Character: U Thant (uncredited)

Richard Rossi

Character: Reporter (uncredited)

Larry Strauss

Character: Treasury Secretary Douglas Dillon (uncredited)

Brad Yoder

Character: Sorensen's Assistant (uncredited)