Stage left and stage right

Also called stage left, stage right, prompt side, opposite prompt, camera left, camera right

Stage left and stage right are the two sides of the stage as seen by an actor standing on it facing the audience, which makes stage left the audience's right.

In UK theatres stage left is usually the prompt side and stage right the opposite prompt side. On a film set the equivalent directions are camera left and camera right, taken from the camera's point of view.