Attachment was examined as a predictor of teens’ empathic support for friends in a multimethod longitudinal study of 184 U.S. adolescents (58% Caucasian, 29% African American, 13% other) followed from ages 14 to 18. Adolescents’ secure state of mind regarding attachment at 14 predicted teens’ greater capacity to provide empathic support during observed interactions with friends across ages 16–18 (Baverage = .39). Teens’ empathic support was generally stable during this period, and less secure teens were slower to develop these skills. Further, teens’ attachment security predicted the degree to which friends called for their support (Baverage = .29), which was associated with teens’ responsiveness to such calls. The findings suggest that secure attachment predicts teens’ ability to provide empathic support in close friendships.