Drawing from the tripartite sociocultural model of body image, the researchers examined whether direct messages and modeling from peers, parents, and media were concurrently and prospectively associated with appearance-based rejection sensitivity (appearance-RS) in young adolescents (Mage = 12.0 years). Appearance-RS was higher among those who concurrently reported more appearance-related teasing and pressure by peers, more parent teasing, and greater acceptance of media appearance ideals. In prospective analyses, greater increases in appearance-RS over 1 year were found for adolescents who perceived higher levels of parental appearance-related teasing and negative attitudes about their own appearance. Moderation analyses indicated the positive prospective association between parental negative appearance attitudes and appearance-RS was found in younger but not older participants. Gender did not moderate associations.