World's 1st feature film to star only one actor was from India
The 1964 film 'Yaadein', which was directed and produced by Sanjay Dutt's late father Sunil Dutt, was the world's first feature film to star only one actor. While the movie starred Sunil Dutt, his wife Nargis Dutt featured only as a silhouette in the climax. Guinness World Records also recognised it for having the 'fewest actors in a narrative film'.