The primary goal of this research was to examine whether the association between willingness to disclose emotions to a romantic partner and psychological well-being is moderated by perceived partner responsiveness. This question was tested across Turkey and the Netherlands, two different cultural contexts in terms of self-views and communication patterns, to see possible cross-cultural differences. A total of 853 (n = 447 for Turkey and n = 406 for the Netherlands) young adults (18–40 age), who are in romantic relationships, had taken part in the present investigation via filling an online survey. Disclosure of different types of emotions was tested in separate models. Results revealed that emotional disclosure in general significantly and positively predicted psychological well-being; however, perceived partner responsiveness did not moderate the role of emotional disclosure in psychological well-being in both countries. Additionally, results did not support the main effect of negative emotional disclosure when all of the variables were in the model. Thus, the findings indicated that higher willingness to disclose emotions, especially positive ones, to romantic partners predicted greater psychological well-being for both Turkish and Dutch young adults above and beyond the influence of perceived partner responsiveness and covariates. By displaying the connections between psychological well-being, emotional disclosure, and perceived partner responsiveness in two different cultural contexts, findings of the present study extended existing literature and highlighted the value of positive emotional disclosure to romantic partners for the psychological well-being of young adults. Findings from this study were discussed based on previous literature findings. ; Thesis (Ph.D.) -- Graduate School of Social Sciences. Psychology