The success and competitiveness of an organization recruiting the emerging workforce i.e., millennials can be ascribed in part to the organization's corporate social responsibility (CSR) engagement. This study explores the impact of organizational CSR on Nigerian millennials' joining intention through CSR motive perceptions: CSR-based organizational attractiveness (CSR-based OA) and perceived altruism (PA). To examine the empirical relationship among variables, data were obtained from respondents who were seeking employment or in-between jobs. Results revealed that CSR-based OA and PA significantly mediate the relationship between CSR and millennial joining intention. Findings present a unique perspective that significantly expands the literature. The implications of results are discussed and recommendations to managers are presented.