The Doris Duke Fellowships for the Promotion of Child Well-Being focused on identifying and nurturing promising doctoral students from multiple disciplines to address intractable challenges in the child well-being field. With the support of a national advisory board comprised of child well-being research experts, the program engaged 120 fellows, in eight cohorts, in a peer-learning network that fostered interdisciplinary thinking and collaboration while promoting actionable research. The first cohort was selected for 2-year fellowships in 2011 and the final cohort was selected in 2018. Since then, a fellow-led transition is expanding the network to other emerging scholars and researchers. The Child Well-Being Research Network (CWRN) launched in 2021, with a central focus on improving diversity, equity, inclusion, and justice in the child well-being research field. The Doris Duke Fellowships Equity Study assessed how staff members, national advisory board members, academic and policy mentors, and Doris Duke Fellows experienced diversity, equity, and inclusion (DEI) during their participation in the Doris Duke Fellowships for the Promotion of Child Well-Being. The study also identified future strategies for the newly established CWRN. This fourth and final research brief focuses on the fellowships program itself; it discusses how diversity, equity, and inclusion were conceptually considered, structured, and experienced by the program's key constituents. The brief discusses what was done well and what opportunities were missed and includes recommendations for similar programs to improve diversity, equity, and inclusion in the child well-being research field.