The Act Early Ambassador project is designed to develop a network of state-level experts to improve early identification practices. It is a collaborative effort on behalf of CDC's National Center on Birth Defects and Developmental Disabilities (NCBDDD), the Health Resources and Services Administration's (HRSA) Maternal and Child Health Bureau (MCHB), the Association of University Centers on Disabilities (AUCD), and the Association of Maternal and Child Health Programs (AMCHP). Act Early Ambassadors serve as state liaisons to the "Learn the Signs. Act Early." initiative and work as community champions with programs that serve young children and their parents, such as Head Start and Early Head Start, WIC, home visiting, and others, and health care and child care professionals to improve early identification of developmental delay and collaborate with state agencies and campaign partners to improve policy and programs for early identification. The current cohort of 45 Ambassadors represent 41 states and three US territories.