This brief provides an overview of infant and early childhood mental health consultations (IECMHC) for policymakers and program leaders, summarizing its state of research and implementation efforts. According to the Center of Excellence for Infant and Early Childhood Mental Health (CoE, 2021) IECMHC is a prevention-based approach that pairs a mental health consultant with adults who work with infants and young children in the different settings where they learn and grow, such as child care, preschool, home visiting, early intervention and their home. (author abstract)