The purpose of this study was to predict group co-leader satisfaction using personality, leadership style, and perceived compatibility of theoretical orientation. Fifty-four co-leader pairs (n = 108 group leaders) completed the NEO-Five Factor Inventory, Leadership Characteristics Inventory, Co-Therapy Relationship Questionnaire, and Co-Therapist Inventory. Co-leaders' perceptions of theoretical compatibility, and differences in co-leader confrontational style, best predicted co-leader relationship satisfaction. In addition, co-leaders who selected their own co-therapist and those in experienced pairs were significantly more satisfied. Implications and recommendations for future research and for selection of co-leadership pairs and supervision of co-led groups are discussed. (Contains 4 tables.)