This book clarifies the role and relevance of the body in social interaction and cognition from an embodied cognitive science perspective. Theories of embodied cognition have during the last decades offered a radical shift in explanations of the human mind, from traditional computationalism, to emphasizing the way cognition is shaped by the body and its sensorimotor interaction with the surrounding social and material world. This book presents a theoretical framework for the relational nature of embodied social cognition, which is based on an interdisciplinary approach that ranges historically in time and across different disciplines. It includes work in cognitive science, artificial intelligence, phenomenology, ethology, developmental psychology, neuroscience, social psychology, linguistics, communication and gesture studies. The theoretical framework is illustrated by empirical work that provides some detailed observational fieldwork on embodied actions captured in three different episodes of spontaneous social interaction and cognition in situ. Furthermore, the theoretical contributions and implications of the study of embodied social cognition are discussed and summed up. Finally, the issue what it would take for an artificial system to be socially embodied is addressed and discussed, as well as the practical relevance for applications to artificial intelligence (AI) and socially interactive technology.