An impersonator is someone who imitates or copies the behavior or actions of another. There are many reasons for impersonating someone:

• Entertainment: An entertainer impersonates a celebrity, generally for entertainment, and makes fun of their personal lives, recent scandals and known behavior patterns. Especially popular objects of impersonation are Elvis Presley (see Elvis impersonator), Michael Jackson (see Michael Jackson impersonator) and Madonna (see Madonna impersonator). Entertainers who impersonate multiple celebrities as part of their act, can be sorted into impressionists and celebrity impersonators. Male drag queens have traditionally been called "female impersonators", although this terminology is now considered outdated. Minstrel shows were a popular form of theater in the United States in which white people impersonated black people by wearing blackface makeup and imitating Southern black speech and music.
• Crime: As part of a criminal act such as identity theft. This is usually where the criminal is trying to assume the identity of another, in order to commit fraud, such as accessing confidential information, or to gain property not belonging to them. Also known as social engineering and impostors.
• Decoys, used as a form of protection for political and military figures. This involves an impersonator who is employed (or forced) to perform during public appearances, to mislead observers.
• Sowing discord, causing people to fight, or dislike each other for social, business or political gain.