actors

On medium or larger budget films the casting director will hire the people with the most talented actor for the role. The job of a casting director is important as their personally hired to make these tough decisions

In some scripts the actor is already chosen in the film as the director has a certain image in their head and has pictured them in it. For example, in the cartoon movie moana the actor the rock was chosen as one of the characters was based on him. Some producers wont do some projects unless certain actors or actresses are playing roles, this maybe because in previous movies they played that role however now it is played by another ie this happens in the james bond movies.

Job skills 

The job skills of an actor consists of rehearsing constantly to be able to remember lines, there for scenes aren't constantly retaken. Also being able to learn different techniques of acting can help as actors are able to learn and improve therefore being able to be to bring something different to the table. An example of acting techniques are method, classic and the Chekhov acting technique.

Method acting is a  type of technique which actors and actresses will fall upon when doing movies with very real and emotional connection, this is when they practically become the character on and off set. Famous method actors for example are Heath Ledger, Jim Carrey, Robet De Nero and Christian Bale and many more.