Michael Gambon (Lyndon Johnson), Donald Sutherland (Clark Clifford), Alec Baldwin (Robert McNamara), Felicity Huffman (Lady Bird Johnson), Bruce McGill (George Ball), Tom Skerritt (General William Westmoreland), Frederic Forrest (General Earle G. Wheeler), James Frain (Richard Goodwin), John Aylward (Dean Rusk, Secretary of State), Philip Baker Hall (Everett Dirksen), Diana Scarwid (), Sarah Paulson (), Gerry Becker (), Peter Jacobson (), Cliff De Young (), John Valenti (), Chris Eigeman (), Francis Guinan (), Robert Cicchini (), Randy Oglesby (), Victor Slezak (), Curtis McClarin (), J.K. Simmons (), Scott Atkinson (), Andrew Borba (), Sarah Brooke (), Channing Chase (), Kevin Cooney (), Gordon Davis (), Reed Diamond (), Wayne Grace (), Albert Hall (), Davis Henry (), Clancy Imislund (), Jan Johannes (), Franklin Dennis Jones (), Patricia Kalember (), Lennie Loftin (), Madison Mason ()