Actor who draws focus from the intended subject through presence or unexpected gesture — often unintentional, sometimes deliberate. Kill it in coverage.
An actor is sitting in the background, and suddenly you're watching him, not the one speaking the lines. That's the core problem: the camera is filming a scene, but the viewer's attention wanders elsewhere — because something stronger, more present, or unexpected is happening there. On set, we call that a scene-stealer, and it's one of the most annoying challenges in ensemble work.
The mechanics are simple: the eye follows movement, contrast, emotion. An actor who moves too much during a dialogue scene, is too present, breathes too loudly, reacts too intensely — they draw the gaze away, no matter where the camera is pointing. Sometimes it's sheer inattentiveness: a performer doesn't know their lighting, plays too broadly, overdoes the reaction. Sometimes it's intentional — an ambitious actor unconsciously reaching for more screen time. And sometimes it happens through pure physiognomy: a certain facial type, a certain posture simply attracts gazes like a magnet.
As a director, you control this through positioning, through lighting (the scene-stealer sits in shadow, the speaker in brightness), through editing — or through an open conversation on set. Some directors consciously teach their supporting actors to make themselves smaller: less movement, lower emotional intensity, pulling focus to the active player. This is not a lack of acting skill, it's ensemble discipline.
In editing, you can still counteract — tighter cuts, faster cuts, sound design that directs focus. But that's firefighting. The clean solution happens in directing and camera work: clear visual hierarchy, proper lighting, proper positioning. A good ensemble works because everyone knows when they have the stage — and when they give it up. That has nothing to do with talent. That's craftsmanship.