--- - |2 Adolescents learn about emotions through interacting with parents and friends, though there is limited longitudinal research on this topic. This study examined longitudinal patterns in parent and friend emotion socialization and adolescent emotion regulation. Eighty‐seven adolescents reported on parent and friend emotion socialization. Parents reported on adolescent emotion regulation. Parents’ responses were stable over time and across gender. Friends of girls reciprocated negative emotions more and were less punitive over time, whereas friends of boys increased in comforting and decreased in neglect of negative emotions. Parents and friends evidenced unique effects on adolescent emotion regulation, and the effect of friend socialization responses differed for girls and boys. Future research should examine combinatory influences of multiple socializers on adolescent adjustment. - Journal of Research on Adolescence, EarlyView.