Day for Night (France/Italy  1973)
" One of the best of the film-within-a-film movies ever made, this work by the late Truffaut captures the poetry and energy of the creative artist at his peak. An ode to film-making, it is a film about making films; about the passion and triumphs, the disappointments, and the reality of the life of the actors and cast. "

In French with English subtitles.
Director: François Truffaut, 120 minutes