Body double

A body double is a general term for someone who substitutes for the credit actor of a character in any recorded visual medium, whether video or film. The term is most commonly used in the context of head-to-toe (or nearly) shot involving nudity. For example, Catherine Bell served as a nude body double for Isabella Rossellini in the movie Death Becomes Her. More specific terms are often used in special cases; a stunt double is used for dangerous or sophisticated sequence. This is in contrast to a stand-in who replaces an actor for non-filming purposes such as scene arrangement and lighting adjustments. Stunt double or body double can both be used for cases where special skills are needed—anything from playing the piano, to competitive skiing. Also, if only a part of the body is shown, the term might be more specific; probably the most common is a hand double, who is used to shoot inserts where only the hand or arm is in the shot. These inserts are often shot by the second unit with a... full article at wikipedia