This reports summarizes the key messages, findings, activities and next steps of the Healthy Mothers Healthy Babies Accelerator, which aims to expedite the implementation and scale-up of multiple micronutrient supplements (MMS) worldwide by reaching more than 17.5 million pregnant women and their newborns in multiple countries. It also reports on the multistakeholder meeting convened by the Micronutrient Forum in early February 2020 as a follow-up to the launch of the Accelerator, that included foundations, academia, implementers, the private sector, governments and NGOs to identify, inform, align and accelerate activity on MMS.