What can be learned from two decades of studies on policy entrepreneurship in developing countries? Policy entrepreneurship is a rapidly evolving analytical concept. A growing number of studies exploring public policy in developing countries use policy entrepreneurship as an explanatory theoretical concept. However, a substantial part of this research relies on qualitative case study analysis, lacking a comprehensive overview of the concept of policy entrepreneurship. This paper conducts a systematic review of the literature on policy entrepreneurship in developing countries. A total of 47 papers addressing policy entrepreneurship in the developing world, published between 1993 and 2017, have been analysed. The purpose and contribution of this paper are to offer a clearer picture of policy entrepreneurship in the developing world by concentrating on two aspects. First, we describe the characteristics of the studies on policy entrepreneurship in the developing world. Second, we analyse such studies, identifying the lessons that can be drawn on the phenomenon of policy entrepreneurship in the developing world. We conclude with an agenda for future studies, examining new theoretical, methodological, and empirical opportunities to advance the understanding of policy entrepreneurship in developing countries.