The federal Family First Prevention Services Act of 2018 (Family First Act) provides a variety of new opportunities for states, tribes, and communities to support children in foster care or at risk of entering foster care. By opening the largest source of federal child welfare dollars to fund evidence-based services that prevent entry into foster care, the law aims to help children stay with their families. The Family First Act also promotes placement with families rather than in congregate care settings, supports kinship caregivers in new ways, and strengthens services for older youth in foster care. Child Trends supports the implementation of the Family First Act through our work to (1) review the existing evidence base for programs to assess eligibility for federal reimbursement and inform evaluation design, (2) design and conduct rigorous evaluations to build evidence for prevention and kinship navigator programs, and (3) track and analyze the financing implications of newly available resources and new requirements. Please contact us at FamilyFirstAct@childtrends.org to learn more.