This dissertation examines the public relations roles played by Instagram influencers.Specifically, I explore how social media publics (e.g., followers) perceive influencers. I do so by applying role theory as a primary theoretical lens and apply Cialdini’s principles of persuasion (authority, consistency, scarcity, reciprocity, liking, social proof, and unity) to investigate the experiences and perspectives of social media followers directly. This dissertation addresses the following three research questions by exploring the social media influencer-follower storyline: RQ1: How do social media influencers define ‘social media influencer’? RQ2: How do social media followers engage with social media influencers and what public relations roles do they see them fulfill? RQ3: How do social media influencers–through persuasive principles–exert influence on different publics? These questions contend with, respectively, firstly, how social media followers define a social media influencer, the second is concerned with the nature and frequency of social media followers engagement with social media influencers. The third and final research question answers what sources of influence used by social media influencers are described as persuasive and worthy of support by followers. By answering these questions, the dissertation serves to fulfill the goals of capturing how publics perceive and define social media influencers; what unique roles social media influencers play from a public relations perspective or viewpoint; and finally, the extent and nature of the influence that social media influencers enact in the public space. Given these research questions, I used qualitative methods of inquiry. Specifically, I conducted an initial questionnaire, which was followed up with in-depth interviews and triangulated by a content analysis. The findings, in order of the aforementioned research questions, (1) illuminated how publics define influencers and engage with them on Instagram—as extensions of their social circle akin to family and friends, (2) demonstrated that social media influencers add to the social influence aspect by building a relationships with their publics, and in doing so, (3) showed how Instagram influencers play an important role in participants lives through the platform and engaging with on an almost daily basis. These specific findings are the ones that fulfill the goals of the research project; the rest of the several findings are by-products or offshoots and can serve as future research areas. In the theoretical context, there have been attempts to define exactly what is meant by the term ‘influencer’, especially in a public relations context. This study fulfills the need of showing how social media influencers are perceived by their publics and how they are changing the landscape of public relations functions research and practice. As such, this work explicates the influential roles influencers play in public relations and in doing so contributes to public relations research and practice. In the applied context, this study examines how social media influencers, with their communication, occupation of online spaces, and bonds with their social media users create relationships with publics. The discussion explores the ramifications of the relational power that is exerted by enacting the role of social media influencer in the public relations space. Social media influencers are staking their place, and much of that role has been enacted through the Instagram platform. This study gets directly at the viewpoint of Instagram users, or in other words, the followers of Instagram influencers.