Faye Dunaway (Diana Christensen)
William Holden (Max Schumacher)
Peter Finch (Howard Beale)
Robert Duvall (Frank Hackett)
Wesley Addy (Nelson Chaney)
Michael Lombard (Willie Stein)
John Carpenter (George Bosch)
Lane Smith (Robert McDonough)
Theodore Sorel (Giannini)
Fred Stuthman (Mosaic Figure)
Sasha von Scherler (Helen Miggs)
Michael Lipton (Tommy Pellegrino)
Russ Petranto (TV Associate Director)
Bernie Pollack (Lou)
Lynn Klugman (TV Production Assistant)
Ken Kimmins (Associate Producer)
Ken Kercheval (Merrill Grant)
Jordan Charney (Harry Hunter)
Ed Crowley (Joe Donnelly)
Jerome Dempsey (Walter C. Amundsen)
Todd Everett (Reporter (uncredited))
Conchata Ferrell (Barbara Schlesinger)
Gene Gross (Milton K. Steinman)
Stanley Grover (Jack Snowden)
Lance Henriksen (Lawyer (uncredited))
Mitchell Jason (Arthur Zangwill)
Paul Jenkins (TV Stage Manager)
Pirie MacDonald (Herb Thackeray)
Darryl Hickman (Bill Herron)
Roy Poole (Sam Haywood)
William Prince (Edward George Ruddy)
Marlene Warfield (Laureen Hobbs)
Lee Richardson (Narrator)
Beatrice Straight (Louise Schumacher)
Ned Beatty (Arthur Jensen)
Arthur Burghardt (Great Ahmed Kahn)
Bill Burrows (TV Director)
Kathy Cronkite (Mary Ann Gifford)