Child marriage, deeply rooted in ancient customs, persists in Asia, the Middle East, and Sub-Saharan regions. Despite its prevalence, a systematic review addressing this practice’s multifaceted nature is lacking. This research aims to fill that gap, with a focus on its causes, consequences and legal challenges that are faced by victims, and suggests intervention measures to curb it. Following PRISMA guidelines, 43 English-language sources, including all the scientific empirical research articles were analysed. The review underscores the need for a more comprehensive approach, as existing studies primarily concentrate on causes and consequences, and neglect legal challenges to the victims. This paper provides valuable insights into child marriage by offering a holistic perspective of the issue.