Yes, I think successful movies should have well-known actors or actresses in leading roles. Famous actors attract a larger audience because people are more likely to watch a movie with their favorite stars. Also, well-known actors often have better acting skills and experience, which can make the movie more enjoyable. Plus, marketing and promotions are easier with recognizable faces, and famous actors can bring credibility to the film.

No, I don't think successful movies need to have well-known actors. New actors can bring fresh talent and perspectives to a film. Audiences may appreciate discovering new faces, and sometimes the story and direction are more important than the actors. Well-written characters can be portrayed by any skilled actor, and the budget can be better spent on special effects or other production aspects.

It depends on the type of movie. Certain genres, like action or romance, may benefit from having star power because audiences expect to see their favorite actors in these roles. On the other hand, independent or artistic films might focus more on storytelling and less on star appeal. Some successful movies have unknown actors who become famous afterward. The director's vision and the script's quality can outweigh the need for famous actors, and different audiences have different preferences regarding star power.