Epic film is a style of filmmaking with large scale, sweeping scope, and spectacle. The usage of the term has shifted over time, sometimes designating a film genre and at other times simply synonymous with big budget filmmaking. Like epics in the classical literary sense it is often focused on a heroic character. An epic's ambitious nature helps to set it apart from other types of film such as the period piece or adventure film. Epic historical films would usually take a historical or a mythic event and add an extravagant setting and lavish costumes, accompanied by an expansive musical score with an ensemble cast, which would make them among the most expensive of films to produce. The most common subjects of epic films are royalty, and important figures from various periods in world history.
The term "epic" originally came from the poetic genre exemplified by such works as the Iliad, Epic of Gilgamesh, or the Odyssey. In classical literature, epics are considered works focused on deeds or journeys of heroes upon which the fate of a large number of people depend. Similarly, films described as "epic" typically take a historical character, or a mythic heroic figure. Common subjects of epics are royalty, gladiators, great military leaders, or leading personalities from various periods in world history. However, there are some films described as "epic" almost solely on the basis of their enormous scope and the sweeping panorama of their settings such as How the West was Won or East of Eden that do not have the typical substance of classical epics but are directed in an epic style.
When described as "epic" because of content, an epic movie is often set during a time of war or other societal crisis, while usually covering a longer span of time sometimes throughout entire generations coming and passing away, in terms of both the events depicted and the running time of the film. Such films usually have a historical setting, although fantasy or science fiction settings have become common in recent decades. The central conflict of the film is usually seen as having far-reaching effects, often changing the course of history. The main characters' actions are often central to the resolution of the societal conflict.