DescriptionPeople are surprisingly accurate in making snap judgments about others’ personalities, relationships, and even sexual orientations. However, the majority of “accuracy research” has focused on examining heterosexual individuals and couples. The current study is unique in that it employs behavioral observations to examine self-observer agreement among gay male and lesbian couples. Seventy-two gay male couples and 72 lesbian couples were video recorded completing tasks that focused on health issues. All participants provided self-reports of the quality of their relationship and relationship satisfaction. Actor-Partner Interdependence Modeling was used to determine actor and partner effects, with participants’ and their partners’ self-reports of their relationship quality and satisfaction as predictors of Thin Slice observational ratings. Results indicate that there are actor effects for both gay men and lesbian women on the relationship dimensions of conflict and commitment, suggesting that conflict and commitment can be observed within just 30-seconds of behavioral observation. These findings have implications for social assessments made daily about others’ relationships as well as therapeutic interventions.