noun
substitute actor; stand-in; double
Refers to a person who replaces another performer in a role, such as in theater, film, or television. Often used for understudies or stunt doubles.
主演俳優が病気で、代り役が舞台に立った。
The lead actor was ill, so the stand-in went on stage.
危険なシーンでは代り役が使われた。
A double was used for the dangerous scene.