Stand-in actor who reads opposite scenes during camera setup, stunts, or VFX — keeps eyeline live for principal actor's performance later.
On set, for technically complex shots — when the camera is on a rig, when you're working with green screen, or when the lead actor needs to be isolated for VFX — you need someone to hold the eyeline. That's the reader. They stand in the right place, speak the counter-dialogue lines, or simply provide a visual anchor point so your actor doesn't play to an empty space and lose emotional energy.
The practical process: You shoot a complex camera move with a stable rig — perhaps a 360° rotation around a face or an overhead crane movement. The lead actor has to be out of frame because the camera would otherwise cast a shadow on them, or because they will be digitally replaced later. The reader replaces them spatially, takes the same head position, speaks the line, or nods at the right time — whatever is necessary for the co-actor to perform their scene. The main shot will later be composited with the correct actor in the edit or in the VFX suite.
This requires precise communication: The reader must know the timing cues, understand and consistently maintain the eyeline. In some productions, this is a 2nd AD, a script supervisor, or simply a production assistant with a strong presence. In larger houses, there are specialized actors for this. A poorly executed reader role will lead to the real actor reacting incorrectly — which is a waste of time and emotionally unsatisfying.
The reader is also often used in mocap shoots when a stunt performer or a placeholder character wears the motion capture suit, and the principal actor can only be present for close-ups or dialogue scenes. In this case, the reader, in a full marker suit, must deliver the opposing movements. This requires them to be familiar with the technical requirements and not need re-briefing with every take.