A "cameo appearance" refers to a brief and often unexpected appearance of a well-known person, typically in a film, television show, or other media. These appearances are usually not central to the plot but serve as a fun surprise for the audience. Famous individuals, such as actors, musicians, or public figures, often take on these roles to connect with fans or add a humorous touch to the production. Cameo appearances can be found in various genres, from comedy to drama. A notable example is Stan Lee, the co-creator of many Marvel superheroes, who made cameo appearances in numerous Marvel films, delighting fans with his recognizable presence.