Missing is a 1982 American biographical thriller drama film directed by Costa-Gavras from a screenplay written by Gavras and Donald E. Stewart, adapted from the book The Execution of Charles Horman: An American Sacrifice (1978) by Thomas Hauser, based on the disappearance of American journalist Charles Horman, in the aftermath of the United States-backed Chilean coup of 1973, which deposed the democratically elected socialist President Salvador Allende.

Konstantinos "Kostas" Gavras, known professionally as Costa-Gavras, is a Greek-French film director, screenwriter, and producer who lives and works in France. He is known for political films, such as the political thriller Z (1969), which won an Academy Award for Best Foreign Language Film, and Missing (1982), for which he won the Palme d'Or and an Academy Award for Best Adapted Screenplay. Most of his films have been made in French, but six of them were made in English.