Michael Myers is a character from the slasher film series Halloween. He first appears in 1978 in John Carpenter's Halloween as a young boy who murders his elder sister, Judith Myers. Fifteen years later, he returns home to Haddonfield, Illinois, to murder more teenagers. In the original Halloween, the adult Michael Myers, referred to as The Shape in the closing credits, was portrayed by Nick Castle for most of the film and substituted by Tony Moran in the final scene where Michael's face is revealed. The character was created by John Carpenter and has been featured in twelve films, as well as novels, video games, and comic books.

A slasher film is a subgenre of horror films involving a killer stalking and murdering a group of people, usually by use of bladed or sharp tools. Although the term "slasher" may occasionally be used informally as a generic term for any horror film involving murder, film analysts cite an established set of characteristics which set slasher films apart from other horror subgenres, such as monster movies, splatter films, supernatural and psychological horror films.