Guided by attachment theory of emotion regulation (ER), the current study utilized a person‐centred approach to identify clusters of individuals that differed in their attachment representations and ER, and further examined individual differences in socio‐emotional functioning based on these profiles. Participants included 658 emerging adults (M = 19.9, SD = 2.7, 65.5% female) who completed surveys measuring responses to rejection, friendship closeness, and emotional maladjustment. Five clusters were identified: secure regulated (19%), disorganized unregulated (21%), anxious unregulated (16%), emotive (21%), and avoidant suppressor (22%). Each group displayed unique patterns, with the secure regulated group reporting significantly less withdrawal, retribution, rumination, and emotional maladjustment, and the disorganized unregulated group reporting the poorest functioning across all indicators. Significant cluster × sex effects were also found for friendship closeness. These findings suggest the importance of considering attachment and ER, and implications for attachment theory and development are discussed.