In the digital age of polymedia (Madianou & Miller, 2012), a multitude of social media platforms provide youth with an endless menu of options, cultural expressions, imagery, metaphors, models, and narratives to tell the world (and themselves) who they are as they develop an autobiographical self (McAdams, 2013). To understand autobiographical selfdevelopment in the context of self-presentations on multiple platforms, we analyzed the structure and content of undergraduate college students' (N = 29, 17 = Female, 12 = Male, M age = 20) storytelling as they guided researchers on a tour of their three most frequently used social media platforms. Whole-person narrative analysis of audiovisual recordings of the social media tours revealed a variety of ways that young people construct themselves as real and recognizable in the context of master narratives surrounding authenticity and branding on social media (Davis, 2014;Marwick, 2013;Marwick & boyd, 2011). We present our insights into the process of constructing the autobiographical self as an authentic brand on social media through excerpts of stories youth tell about themselves and their experiences primarily on Twitter, Instagram, and Facebook.