Celebrities are famous individuals, well known by many members of the public, who appear frequently in media content. When celebrities appear in the media alongside another cause, be it selling soap or promoting public health, the message becomes a celebrity appeal. Celebrity appeals are messages where a celebrity advocates for or is implicitly associated with a target behavior. In the context of health and risk-related messages, celebrity appeals can take the form of public service announcements, advertisements for health and risk-related products, or even news coverage of a celebrity’s personal struggles with a health issue or risky behavior.
Research on celebrity appeals overlaps with the marketing literature investigating the effects of celebrity endorsements on product preferences and purchasing behavior. This work on the persuasiveness of celebrity endorsements demonstrates that celebrities can draw attention to a product or idea, but also that many other factors, like involvement, familiarity, source credibility, and endorser gender can moderate how persuasive a celebrity-based appeal is. Additionally, research on celebrity disclosures of illnesses reveal that these de facto awareness campaigns can elicit emotions in audiences and motivate behavior change. However, media coverage of celebrities has also been associated with harmful effects on lay individuals’ wellbeing, suggesting important caveats for message designers who rely on celebrities to garner attention for a cause or to motivate lay individuals to change their own health and risk-related behaviors. The existing empirical evidence on celebrity appeals and additional theoretical perspectives for understanding their potential persuasiveness provides many insights for message designers.