A cameo is a small, usually oval or round, carving in relief, often used as an ornament or part of jewelry. It typically features an image or scene, and may be made from various materials such as stone, shell, glass, or plastic. The term "cameo" can also refer to a brief appearance by a well-known person in a film or television show, often used for comedic effect or to acknowledge the presence of another actor or crew member. In literature and drama, a cameo role is a minor part with little screen time but significant impact on the overall storyline.