This study investigated child and early adolescent relationships with parents and peers within the theoretical framework of attachment. A cross-sectional sample of 279 fourth, sixth, and eighth graders completed two self-report measures assessing attachment to parents and friends. Fourth graders described more trusting and communicative relationships with parents than sixth or eighth graders. Older early adolescents turned to peers to fulfill attachment functions of proximity seeking and safe haven more often than children, although all participants reported that parents primarily served secure base functions. Females reported more trust, communication, and overall attachment to peers than males. Grade, sex, and views of attachment relationships to parents and peers predicted the introduction of friends into the attachment hierarchy. Participants who viewed relationships with parents as less secure were more likely to select peers to fulfill attachment functions. The important and complementary roles of parents and peers and their implications are discussed.