This article analyzes celebrities’ norm entrepreneurship through a specific instance of its enactment: Ashton Kutcher and Demi Moore’s media campaign against human trafficking (the K&M Campaign). Drawing from literatures about celebrities and politics and norm entrepreneurship, and using qualitative-interpretive methods of data collection and analysis, I show how the K&M Campaign provides an early, high-profile example of this norm entrepreneurship that demonstrates why and how celebrities communicate norms to the broader public. To illustrate, I show how changing political-economic conditions have facilitated celebrities’ ascendance in the polity, and I argue that Kutcher and Moore have emerged under these conditions to actively oppose human trafficking. Using their considerable resources, they have promoted an “individual responsibility” norm that instructs the public to avoid coercive sexual and labor activities and trafficking situations. I then argue further that the K&M Campaign provides broader lessons about norms’ fluidity: even when they are seemingly incontrovertible and their entrepreneurial proponents (celebrities) have extensive resources, norms may be contradicted and contentious nonetheless. In this case, by promoting an individual responsibility norm, Kutcher and Moore inadvertently conveyed retrograde gender norms and minimized the importance of broader structural solutions to human trafficking.