James Spader

as Daniel Ellsberg

Claire Forlani

as Patricia Marx

Paul Giamatti

as Anthony Russo

Alan Arkin

as Harry Rowen

Kenneth Welsh

as John McNaughon

Maria del Mar

as Carol Ellsberg

Aaron Ashmore

as Randy Kehler

Jonas Chernick

as Neil Sheehan

Martin Roach

as Sgt. Watson

Bruce Gooch

as Supreme Court Marshal

Sean McCann

as John Mitchell

James Downing

as H.R. Haldeman

Richard Fitzpatrick

as John Ehrlichman

Amy Price-Francis

as Jan Butler

George R. Robertson

as Senator Fulbright

Robert Seeliger

as FBI Agent

Roland Rothchild

as FBI Agent

Damir Andrei

as Leonard Boudin

Carl Marotte

as Charles Nesson

David Fox

as Judge W. Matthew Byrne

Neville Edwards

as Bailiff

Matt Cooke

as Rand Employee

Jonathan Higgins

as Army Officer at Rand

Owen Rilan

as Corcoran

Sharon McFarlane

as Charlotte

Daneen Boone

as Blonde at Russo's

Judah Katz

as District Attorney

Mark Benesh

as Leonard Compson III

Troy Blendell

as Marine Radio Man

Amy Troung

as Vietnamese Woman

Kris Saric

as Marine Captain in Bar

Derek Murchie

as Air Force Officer in Bar

Hannah Lochner

as Mary Ellsberg - Younger

Hayley Lochner

as Mary Ellsberg - Older

Michael Cameron

as Robert Ellsberg - Younger

Adam Butcher

as Robert Ellsberg - Older

Julio Benitez Guardiola

as Plumber

John Connolly

as Plumber

Brandon Barré

as Patricia's Boyfriend

Richard Blackburn

as New York Times Editor

John Blackwood

as TV Journalist

Michael Spencer-Davis

as News Reporter

David Lyle

as News Reporter