A "cameo role" refers to a brief appearance or role in a film, television show, or theater production, typically played by a well-known person. These roles are often not central to the plot but are memorable due to the celebrity's recognition. Cameos can add humor, surprise, or a special touch to a scene. Famous examples of cameo roles include Stan Lee in various Marvel films, where he appears as a character in a short scene. Such appearances are often enjoyed by fans, who look forward to spotting their favorite celebrities in unexpected places.