Adolescence is a crucial and defining stage in a girl’s life. However, girls around the world too often face unique risks of gender discrimination and gender-based violence (GBV), including sexual violence, human trafficking, forced marriage and sexual exploitation and abuse. This is particularly the case in humanitarian settings, where girls’ already-limited access to vital services and family and peer support networks are disrupted by crises and displacement. Despite this, humanitarian programmes and policies do not adequately address adolescent girls’ needs. Caught between childhood and adulthood, these girls are often not able or willing to access services designed for adult women or young girls.