Natalie Portman as Jackie Kennedy

Peter Sarsgaard as Robert Kennedy

Greta Gerwig as Nancy Tuckerman

Billy Crudup as The Journalist

John Hurt as The Priest

Richard E. Grant as Bill Walton

Caspar Phillipson as John Fitzgerald Kennedy

Beth Grant as Lady Bird Johnson

John Carroll Lynch as Lyndon B. Johnson

Max Casella as Jack Valenti

Sara Verhagen as Mary Gallagher

Hélène Kuhn as Pam Turnure

Deborah Findlay as Maud Shaw

Corey Johnson as Larry O'Brien

Aidan O'Hare as Ken O' Donnell

Ralph Brown as Dave Powers

David Caves as Clint Hill

Penny Downie as Janet Lee

Georgie Glen as Rose Kennedy

Julie Judd as Ethel Kennedy

Peter Hudson as Admiral George Burkley

John Paval as Dr. John Walsh

Bill Dunn as Father John Kuhn

Vivienne Vernes as Judge Hugues

Craig Sechler as Governor Connally

Rebecca Compton as Nellie Connally

Bryan Ashby as Reporter Love Field

David DeBoy as John Metzler

Stéphane Höhn as Charles Collingwood

Serge Onteniente as Charles de Gaulle

Sunnie Pelant as Caroline Kennedy

Aiden Weinberg as John F. Kennedy Jr.

Brody Weinberg as John F. Kennedy Jr.

Roland Pidoux as Pablo Casals

Emmanuel Herault as Robert McNamara

William Beaux d'Albenas as Hugh Auchincloss

Nicolas Guigou as James Auchincloss

David Friszman as Jack Brooks

Chloé Berthier as Toni Bradlee

Eric Soubelet as Benjamin Bradlee

Gaspard Koenig as Ted Kennedy

Mathilde Ripley as Joan Bennett Kennedy

Barbara Foliot as Pat Kennedy

Albain Venzo as Peter Lawford

Frédérique Adler as Eunice Kennedy Shriver

Patrick Hamel as Sargent Shriver

Benjamin Loeh as Kennedy Family Member

Jeff Moore as Secret Service Agent

Marla Aaron Wapner as Dallas Kennedy Fan

Nathan Ferguson as Kennedy Family

Lindsay Dyan Epp as Mourner

Yann Bean as Air Force Officer

Eric Supensky as Sargeant Shiver

John Mitchell as Dallas Police Officer

Alejandro Chamorro as General McHugh

Dan Mendel as JFK Fan

Don Whatley as Secret Service Limo Driver

Stephanie Cookie Carson as Mourner

Chaz Riddle as Mover

Sarah Middlemiss as Mourner

Kahil Dotay as Airport Worker #1

Loretta Burnette as Mourner

George Kardulias as Mourner with 8mm Movie Camera

Kayla Anderson as Mourner / Townsperson

Chrisdine King as Joan Kennedy

Grégoire Foessel as Death Watch Guard

Denise Basile as Eunice Kennedy Shriver

Stephen L. Kolb as Greek Orthodox Archbishop Iakovos

Rick Burk as Secret Service Agent

Jay Bush II as General Earle Wheeler

Robert E Thompson as Dallas Reporter

Dawn Lucajko as Kennedy family mourner

Richard Allen Cramer as Mourner (uncredited)

Maya Nalli as Mourner

Ken Starcevic as Ambulance Driver

Ian McCleary as Reporter #2

Justin Schweiger as Secret Service #1

Lee Harvey Oswald as Self (archive Footage)