A title role player is an actor or actress who is the main character in a movie, television show, play, or other production. They are typically the most recognizable person in the production and often have the most lines. The term 'title role player' is derived from the fact that they are usually listed first in the credits and their name is often used in the title of the production. In a crossword puzzle, the term 'title role player' can be abbreviated to 'STAR, ' which is a four-letter word.