This investigation specified three models regarding the association between identity and intimacy formation and investigated their potential validity using a longitudinal cross-lag panel design. Seventy-one males and 71 females completed identity and intimacy measures on two occasions over a 5-week period. The primary findings are (1) individuals with a clear sense of identity are more likely, 5 weeks later, to have a more advanced sense of intimacy for both sexes when sex-role identification is removed from gender comparisons; (2) sex-role orientation mediates the identity/intimacy association, while for females, a masculine orientation is associated with a pattern similar to that observed for either masculine- or feminine-oriented males; and (3) femininity is associated with a more fused connection between identity and intimacy for females. This report provides an initial investigation studying the identity/intimacy association during late adolescence based on three theoretical perspectives. Theoretical interpretations and conclusions are offered.