Michael Gambon as Lyndon Johnson

Donald Sutherland as Clark Clifford

Alec Baldwin as Robert McNamara

Bruce McGill as George Ball

James Frain as Richard Goodwin

Felicity Huffman as Lady Bird Johnson

Philip Baker Hall as Everett Dirksen

Frederic Forrest as Earle G. Wheeler

Diana Scarwid as Marny Clifford

Sarah Paulson as Luci Baines Johnson

Chris Eigeman as Bill Moyers

Tom Skerritt as William Westmoreland

John Aylward as Dean Rusk

Peter Jacobson as Adam Yarmolinsky

Gerry Becker as Walt Rostow

J.K. Simmons as CIA Briefer

Reed Diamond as Duty Officer

Gary Sinise as George Wallace

Cliff DeYoung as McGeorge Bundy

Francis Guinan as Nicholas Katzenbach

Robert Cicchini as Joseph Califano

Randy Oglesby as John Stennis

Gina-Raye Carter as Lynda Bird Johnson

Brenda Wehle as Juanita Roberts