A feature film or feature-length film, also called a theatrical film, is a narrative film with a running time long enough to be considered the principal or sole presentation in a commercial entertainment program. The term feature film originally referred to the main, full-length film in a cinema program that included a short film and often a newsreel. Matinee programs, especially in the US and Canada, in general, also included cartoons, at least one weekly serial and, typically, a second feature-length film on weekends.

L'Inferno is a 1911 Italian silent film, loosely adapted from Inferno, the first canticle of Dante Alighieri's Divine Comedy. L'Inferno took over three years to make, and was the first full-length Italian feature film.