Communities are investigating new ways to expand access to high-quality early education. A new early care and education partnership initiative in a mid-Atlantic state offered publicly-funded preschool slots to eligible children in private early childhood programs and provided quality supports to participating private programs. This qualitative study examines the implementation of this partnership initiative from the perspectives of administrators, early childhood program staff, and family members of enrolled children. Researchers conducted 15 focus groups with these stakeholders across five communities and used a directed content analysis approach to analyze the data. Research Findings: The thematic findings from this study suggest that ECE partnerships can improve implementation processes by developing intentional communication plans and paying attention to the needs and preferences of early childhood program staff and families. The study findings also suggest that private programs may be able to counter the loss of preschool enrollment slots to public schools by participating in ECE partnerships. Practice and Policy: Policymakers may use these findings to inform the design of new ECE partnership initiatives or other initiatives that involve collaboration among early care and education programs. Practitioners may use these findings to inform planning for new partnerships they are engaged in.