Practice/Policy Question: Does an online family-based intervention prevent negative outcomes among sexual and gender minority youth (SGMY) of color and promote positive youth development (PYD)? Background: SGMY of color experience high rates of behavioral, social, emotional, relational, and academic problems due in part to systems of oppression/inequality. Although family rejection of SGMY of color is a key source of inequity, we know little to date about how to prevent it. The Faily Acceptance Project (FAP) is a highly promising program that may help to prevent caregiver reject thus reducing inequality and negative outcomes among SGMY. To date, the FAP has not been rigorously evaluated, which the current study seeks to do. Research Aims or Questions: (1) Finalize the FAP-0 with ongoing feedback Youth and Caregiver Advisory Boards and Topical Experts; (2) Conduct an open pilot trial (OPT) to document acceptability and feasibility and refine FAP-O; (3) Conduct a pilot randomized control trial (RCT) to examine the impact of FAP-O on reducing negative outcomes among sexual and gender minority youth of color and promote PYD via reducing caregiver rejecting behaviors and increasing caregiver accepting behaviors. Setting and Participants: 7 SGMY of color (ages 14 to 18)/caregiver dyads (N=14) for the OPT and 90 SGMY of color (ages 14 to 18)/caregiver dyads (N=180) for the RCT will be recruited from across the U.S. to participate in the online intervention. Intervention: FAP is a rigorously developed family-based intervention for caregivers of SGMY as well as SGMY in the U.S. FAP, created by Dr. Caitlin Ryan, seeks to prevent myriad deleterious outcomes and promote PYD for SGMY in the context of their families, cultures, and faith communities. FAP includes both caregiver (to reduce rejection and increase accepting behaviors) and SGMY (to reduce internalized oppression and promote healthy coping and hope for the future) components as well as family (to promote family bonding) and group (to provide social support) sessions. Research Methods: During the OPT phase of the study, pre and immediate post-test surveys as well as post-session surveys will be used to assess acceptability and feasibility. This information will be used to refine FAP-O. During the RCT phase, 70 SGMY/ caregiver dyads will be randomized to wait-list or to complete the online FAP in groups of seven dyads. Pre-, immediate post-, and 6- month follow-up data assessing outcomes will be collected. Data on the acceptability and feasibility of the intervention will be collected from participants assigned to receive the online FAP and program facilitators. Rigorous statistical analyses will be used to examine FAP’s impact on (1) fostering parent/caregiver acceptance and support of their SGMY, (2) facilitating family bonding and communication, and (3) reducing internalized oppression among SGMY