Kenneth O'Donnell

Kevin Costner

John F. Kennedy

Bruce Greenwood

Robert F. Kennedy

Steven Culp

Robert McNamara

Dylan Baker

Adlai Stevenson

Michael Fairman

Dean Rusk

Henry Strozier

McGeorge Bundy

Frank Wood

Dean Acheson

Len Cariou

General Curtis LeMay

Kevin Conway

Ted Sorensen

Tim Kelleher

Helen O'Donnell

Lucinda Jenney

General Maxwell Taylor

Bill Smitrovich

Gen. Marshall Carter

Ed Lauter

U-2 Pilot

Shawn Driscoll

Arthur Lundhal

Dakin Matthews

Mark O'Donnell

Drake Cook

Pierre Salinger

Kelly Connell

Admiral George Anderson

Madison Mason

Commander William B. Ecker

Christopher Lawford

Jacqueline Kennedy

Stephanie Romanov

Anotoly Dobrinyn

Elya Baskin

Kathy O'Donnell

Caitlin Wachs

Alexander Fomin

Boris Lee Krutonog

Maj. Rudolph Anderson

Charles Esten

Kenny O'Donnell, Jr.

Jon Foster

Kevin O'Donnell

Matthew Dunn

John McCone

Peter White

John Scali

Jack Blessing

Andrei Gromyko

Olek Krupa

George Ball

James Karen

Evelyn Lincoln

Janet Coleman

NPIC Photo Interpreter

Kevin O'Donnell

Journalist

Timothy Jerome

Floyd

Bruce Thomas

Kennedy Assistant No. 1

Liz Sinclair

Lyndon Johnson

Walter Adrian

Valerian Zorin

Oleg Vidov

Kenny's Assistant #2

Colette O'Connell

Operator Margaret

Karen Ludwig

White House Operator No. 1

Audrey Rapoport

White House Operator #2

Marliese Schneider

Richard J. Daley

Jack McGee

General Walter 'Cam' Sweeney

Dan Ziskie

Orville Dryfoos

John Aylward

Lieutenant Bruce Wilhemy

David O'Donnell

White House Aide

Vivien Straus

Petty Officer

Gene Del Bianco

OAS Secretary General José A. Mora

Daniel Vergara

Aide

Lamar Smith

Argentine Diplomat

Reuben Moreno

Sonar Operator

Thomas Roberts

Chief Sonarman

Sean Bergin

Executive Officer of USS Pierce

Alan Francis

Radio Room Operator No. 1

Robert Munstis

Captain of USS Pierce

Michael Gaston

Radio Room Operator No. 2

Joseph Repoff

RF-8 Pilot

Benjamin Koldyke

Captain of USS Kennedy

J. Tucker Smith

Officer of Destroyer

Chris Henry Coffey

Argentine Diplomat

Ruben Moreno

Romanian Delegate

Radu Gavor

Chilean Delegate

Zitto Kazann

Radio Room Operator No. 3

Alex Veadov

Executive Officer of USS Pierce

Alan Francis Sullivan

Walter Sheridan

Tom Everett

Young FBI Agent

Karl Makinen

Air Force NCO

Charles Barrett

Football Coach

Darryl Smith

Football Referee

Alan Graf

RFK's Driver

Robert Miranda

RFK's Staffer

Todd Sible

Soviet Woman

Marya Kazakova

Aerial Coordinator

Cliff Fleming

Pilot

Craig Hosking

RF-8 Pilot

Ben Koldyke*

Football Referee

Allan Graf

White House Operator No. 2

Marliese K. Schnieder

Secret Service Agent (uncredited)

Greg Bronson

Self (archive footage) (uncredited)

Walter Cronkite

Boy Scout (uncredited)

Ryder Davis

Crewman on Freighter (uncredited)

Armen Garo

Air Force Pilot (uncredited)

Gilley Grey

UN Administrator (uncredited)

Phil Hawn

Carpenter (uncredited)

Rick Kain

Self (voice) (archive footage) (uncredited)

John F. Kennedy

U Thant (uncredited)

Pramod Kumar

Reporter (uncredited)

Richard Rossi

Treasury Secretary Douglas Dillon (uncredited)

Larry Strauss

Sorensen's Assistant (uncredited)

Brad Yoder