Jason Clarke
Role: Ted Kennedy
Kate Mara
Role: Mary Jo Kopechne
Ed Helms
Role: Joseph Gargan
Bruce Dern
Role: Joseph Kennedy
Jim Gaffigan
Role: Paul Markham
Olivia Thirlby
Role: Rachel Schiff
Clancy Brown
Role: Robert McNamara
Taylor Nichols
Role: Ted Sorensen
John Fiore
Role: Chief Arena
Gillian Mariner Gordon
Role: Cricket
Lexie Roth
Role: Nance Lyons
Angela Hope Smith
Role: Maryellen Lyons
Vincent Tycer
Role: David Burke
Victor Warren
Role: Stephen Smith
David De Beck
Role: Sargent Shriver
Barry Press
Role: Burke Marshall
Matthew Lawler
Role: Dun Gifford
Beth Petrou
Role: Ann Gargan
Thomas Kee
Role: Walter Steele
Andria Blackman
Role: Joan Kennedy
Donald Watson
Role: Dr. Watt
Walter Driscoll
Role: Dr. Mills
Joe Chase
Role: John Farrar
Joseph Zamparelli
Role: Officer Look
Charlotte Dore
Role: Gwen Kopechne
Tim Jackson
Role: Joseph Kopechne
Damien Di Paola
Role: Ray LaRosa
Ed Peed
Role: Eugene Frieh
Bill Humphreys
Role: James Reston
Gary Tanguay
Role: TV Interviewer
Diana Boudreau
Role: Police Secretary
Alison Wachtler
Role: Liz Trotta
Tony Viveiros
Role: Floor Producer
Sean Patrick Hopkins
Role: Ross Richards
Tamara Hickey
Role: Marilyn Richards
Nancy O'Brien
Role: Neighbor
Tom O'Brien
Role: Neighbor's Husband
Noah Carpenter
Role: Teddy Jr.
Sarah Elizabeth Mitchell
Role: Senate Secretary
A.J. Accardi
Role: Hotel Clerk
Theresa Curran
Role: Cantor
Michele Proude
Role: Vicki
Michael Fennimore
Role: Chief of Staff
George Capaccio
Role: Doctor
Dustin Tucker
Role: Senatorial Aide
Jack Harte
Role: Reporter #1
Bob Jaffe
Role: Reporter #2
Brian Currie
Role: Reporter #3
Paul Pape
Role: Dick Drayne (voice)
Jake Head
Role: James Smith (voice)
Chris Edgerly
Role: Edmund Dinis (voice)
Wally Wingert
Role: Newscaster (voice)
Piotr Michael
Role: Newscaster (voice)
Bill Mootos
Role: Older Reporter
Jody Ebling
Role: Ethel Kennedy
Philip Dorn Hebert
Role: Jack Crimmins
Holt Murray
Role: Mr. Samuels
Sawyer Murray
Role: Donnie
Rick Malone
Role: Steele Cronie
Rick Hamilton
Role: Ferry Captain
Paul Taft
Role: Vineyard Gazette Photographer
David Callanan
Role: Charles Tretter
Thomas Whitestone
Role: Organist
Patrick Sheehan
Role: Lawyer
Jeff Savage
Role: John Culver
Ed O'Keefe
Role: Funeral Priest
Thomas Brogan
Role: Edgartown Policeman
Robert Burke
Role: Admin Worker
Charles Mathison
Role: Admin Worker
Luke Nelson
Role: Admin Worker
Robert Tremouille
Role: Admin Worker
Skye Gladstone
Role: Dike House Inhabitant
Timothy Canady
Role: Security Agent
Patrick Parhiala
Role: Security Agent
Whitney Cass
Role: Security Agent
Robert Conley
Role: Security Agent
Michael Swanson
Role: Security Agent
Ralph Bennett
Role: Fire Truck Driver
Nathan Bruckler
Role: Tow Truck Driver
Camille Faman
Role: Female Employee
Carrie Ann Quinn
Role: RMV Attendant
Susan Garfield
Role: Senate Staffer (uncredited)
Marinko Radakovic
Role: Reporter
Paul Bellefeuille
Role: Dike House Resident (uncredited)
Joe Cali
Role: Reporter (uncredited)
Jesse Christensen
Role: Reporter (uncredited)
Rob DiNinni
Role: Reporter #4 (uncredited)
Stephan F Feeley
Role: Funeral guest / mourner (uncredited)
William Galatis
Role: Shiretown Inn Guest (uncredited)
Johnny Hawe
Role: Stephen Sorenson (uncredited)
Bobby Kenney
Role: Investigative News Reporter (uncredited)
Dov Kling-Levine
Role: Protester / Local (uncredited)
Jimmy Malcolm
Role: News Photographer (uncredited)
Jason Mulcahy
Role: Reporter (uncredited)
Anthony Pelton
Role: Plymouth Pennsylvania Polic Officer (uncredited)
Bill Porter
Role: Investigative News Reporter (uncredited)
Harold Rudolph
Role: Funeral attendee (uncredited)
John Sarnie
Role: Mourner (uncredited)
Alexander Platt
Role: Stan Moore
Sigrid Lium
Role: Senate Staffer (uncredited)
Kimberly Mae Waller
Role: Funeral Guest (uncredited)
