COVID-19 is exposing and exacerbating the existing inequalities that put girls at increased risk of gender-based violence (GBV). Adolescent girls, particularly girls who are married, girls with disabilities and those living in humanitarian contexts face heightened risks, and often fall between services designed for adults and children. This policy brief includes program examples and makes concrete recommendations for UN actors, donors, national governments, humanitarian actors, and the media to ensure that risk factors for gender-based violence are prevented, mitigated against, and responded to as an urgent priority through COVID-19 to recovery.