The current study adopted a socioemotional perspective to examine gender differences in sleep problems in the context of co-rumination and depressive symptoms. Dyadic interactions in friendships appear to partially explain gender differences in sleep problems. Because co-rumination appears to be an important correlate of sleep problems, especially in females, interventions that target this sequence of maladaptive social support could potentially inhibit the unfolding of this process by facilitating the use of more effective coping strategies (e.g., problem-fo- cused coping).