This publication is part of IPPF’s thematic focus on adolescents and young people. We recognize the important role of joint advocacy action in addressing child marriage. This advocacy tool is also part of the wider initiative on preventing HIV infection, particularly among adolescent girls, which is led by the United Nations Global Coalition on Women and AIDS (GCWA), with the support of the United Nations Population Fund (UNFPA) and Young Positives. Ending Child Marriage: A Guide for Global Policy Action makes a strong case for international action, and strengthens the advocacy efforts of development practitioners and women’s and children’s rights activists to end child marriage. This work is a result of a series of technical consultations on child marriage, organized by the International Planned Parenthood Federation (IPPF) in collaboration with the Forum on Marriage and the Rights of Women and Girls. This practical tool documents the special needs of child brides and outlines the nature of the economic and social factors which reinforce the practice. It provides solutions based on a child protection framework, and advocates for the use of legal, policy and multi-sector programme strategies for delaying child marriage for those at risk and meeting the needs of young women who are newly married. It will add value to other ongoing efforts to end child marriage and promote the rights and true voices of countless young people, in particular girls and young women around the globe, who have been marginalized for far too long.