Actors can make or break a movie, whether there are huge star-studded ensemble casts, or just a couple of quality actors who let the script shine for itself. There are not many films that manage to thrive on one actor carrying the entire film alone.
Andy Warhol experimented with the concept in his 1963 anti-film "Sleep", which consists of 321 minutes of long take footage of a close friend is sleeping for the entirety of the film.
The concept of one actor carrying a movie has long been thought to be a stunt, an experiment – just to see how well the actor could act and how good everything else in production must be to counterbalance the lack of characters. However, this idea has become more common and proves that it's the quality of the actor that counts, not the quantity.
This is for the social distancers in the audience
