The present study examined how culture and gender influence the self-construal of mothers and their four-year-olds during dyadic reminiscing. Participants were 21 Thai (11 girls, 10 boys) and 21 American (10 girls, 11 boys) mother-child dyads. Thai dyads exhibited a more interdependent self-construal, whereas American dyads exhibited a more independent self-construal, as measured by personal and group pronoun usage and discussions of behavioral expectations, thoughts and feelings, and personal attributes. Girls and boys differed in the extent to which their self-construal was defined in relation to others in their social groups, for example girls mentioned teachers and classmates more than boys. Culture and gender also interacted in influencing self-construal, with Thai girls (but not boys) mentioning family members more than American counterparts. These findings suggest that the development of children's self-construal, particularly the extent to which children are socialized to view and express themselves independently of others or interdependently with others, differs depending on culture and gender. This work contributes to our understanding of the relationship between autobiographical memory and self during the formative years. Starting as early as preschool, our social environment influences the way we remember our experiences, which in turn shapes our self-construal.