* Region: Popularity differs across the globe.
* Genre: Some actors are more popular in specific genres like action, comedy, or drama.
* Age Group: Different age groups have different preferences.
* Current Projects: Actors' popularity can fluctuate based on their latest releases.
However, some actors who are consistently recognized and have global fame include:
* Tom Cruise: Known for action franchises like "Mission: Impossible."
* Leonardo DiCaprio: A critically acclaimed actor known for diverse roles.
* Dwayne "The Rock" Johnson: A charismatic actor popular for action and comedy.
* Scarlett Johansson: A versatile actress with a wide range of roles.
* Robert Downey Jr.: Known for his iconic role as Iron Man.
* Chris Hemsworth: Popular for his role as Thor in the Marvel Cinematic Universe.
* Jennifer Lawrence: A critically acclaimed actress with a loyal fanbase.
* Brad Pitt: A veteran actor with a diverse filmography.
* Meryl Streep: A highly acclaimed actress with numerous awards.
Ultimately, the "most well-known" actor is subjective and constantly changing based on current events and cultural trends.