Teenagers’ interest in highbrow culture like classical music, museums and plays is somewhat low, but this group’s extensive Internet use may heighten this interest and increase their cultural participation online. In contrast to previous research, we examined teenagers’ online involvement in both popular and highbrow culture. An investigation among 892 high school teenagers indicated that explanations from the fields of cultural participation and media use account for differences in online cultural involvement. Teenagers with parents who are more highly educated and culturally active, and those with culturally interested friend are in turn more interested in culture, and communicate online more about both highbrow and popular culture. In addition to interest and socialization, there appears to be a minor mobilization effect of Internet use, as those with better digital skills and spending more time online engage more in online cultural communications.