This book examines the mediated shift in the contemporary human condition, focusing on the ways in which we synthesise with media content in daily life, essentially transmediating ourselves into new forms and (re)creating ourselves across media. Across an international roster of essays, this book establishes a transdisciplinary theory for the ‘transmedia self’, exploring how technological ubiquity and digital self-determination combine with themes and disciplines such as celebrity culture, fandom, play, politics, and ultimately broader self-conception and projection to inform the creation of transmedia identities in the twenty-first century. Specifically, the book repositions transmediality as key to understanding the formation of identity in a post-digital media culture and transmedia age, where our lives are interlaced, intermingled, and narrativised across a range of media platforms and interfaces. This book is ideal for scholars and students interested in transmedia storytelling, cultural studies, media studies, sociology, philosophy, and politics.