The Longest Most Meaningless Movie in the World (also known as The Longest and Most Meaningless Movie in the World, The Most Meaningless Movie in the World and Meaningless Movies) is a 1968 British underground film lasting 48 hours directed by Vincent Patouillard. It was produced by Anthony Scott and created as a collaboration with French and British filmmakers in association with the Swiss Film Centre and the starring Donald Campbell advertising a boys' adventure magazine is looped forty times, amounting to half an hour's worth of video. The film notably features Hermine Demoriane, Roger Dixon, Graham Stevens, Carla Liss and Martine Meringue. As British artist David Curtis has noted, the film had low production values.
The film was originally released in 1968 at the Arts Lab and the Cinémathèque Française, being one of the first films made by London Film-Makers' Co-op. It was subsequently aired at various locations within the next 2 years. At the time of its release it was the longest film made, but has since been superseded by other films; the current longest film ever made is Logistics.