Almost without fail, every other person who is part of a film, television show, or other filmed type of storytelling is behind the camera. In fact, it’s often considered a huge mistake if someone like the boom operator is accidently caught on camera.
This makes the Actors a part of the filmmaking process entirely unto their own, as their entire job is done on camera! That’s often why Actors become the most famous association with any given movie. Audiences come to identify a film or show with the Actors because that’s who we see and laugh, cry, rage, or otherwise sympathize with.
On set, it is the job of the Actors to convincingly perform the role of the character whom they were cast as to effectively tell the story of the script.