The Longest Day is a 180 minute, 1962 war film which tells the story of D-Day; it is based upon a history book, of the same name, by Cornelius Ryan.

The enormous cast includes Eddie Albert, Paul Anka, Richard Burton, Red Buttons, Sean Connery, Fabian, Mel Ferrer, Henry Fonda, Steve Forrest, Gert Fröbe, Leo Genn, Jeffrey Hunter, Curt Jurgens, Peter Lawford, Dewey Martin, Roddy McDowall, Sal Mineo, Robert Mitchum, Kenneth More, Edmond O'Brien, Robert Ryan, Tommy Sands, George Segal, Rod Steiger, Robert Wagner, Stuart Whitman and John Wayne.

The movie was adapted by Romain Gary, James Jones, David Pursall, Cornelius Ryan and Jack Seddon from the Ryan book. It was directed by Ken Annakin (British exteriors), Andrew Marton (American exteriors), Gerd Oswald (parachute drop scene), Bernhard Wicki (German scenes) and Darryl F. Zanuck (uncredited).

It won Academy Awards for Best Cinematography, Black-and-White and Best Effects, Special Effects, and was nominated for Best Art Direction-Set Decoration, Black-and-White, Best Film Editing and Best Picture.