Appearance‐based rejection sensitivity (appearance‐RS) consists of concerns about, and expectations of, rejection because of one's appearance (Park). This study examined dyadic‐ and group‐level friendship characteristics as correlates of early adolescents' appearance‐RS. Using subgroups of an initial sample of 380 participants, appearance‐RS was examined within best friend relationships (N = 132, Mage = 13.84) and friendship groups (N = 186, Mage = 13.83). Overall, best friends were similar in their appearance‐RS, body dissatisfaction, restrictive dieting, appearance‐conditional self‐worth, appearance values, and self‐rated attractiveness. Similarities between individuals and their friendship groups were consistent with the findings for dyads, except for self‐rated attractiveness and dieting. Appearance‐RS was higher in adolescents whose best friends and friendship groups reported greater restrictive dieting and appearance‐conditional self‐worth. In general, associations did not differ for boys and girls, but having a higher proportion of boys in the friendship group was associated with lowered appearance concerns.