Recently, scholars have started to pay attention to how sexualization may occur in social media, where adolescents are said to self-sexualize through posting sexy pictures of themselves (sexy self-presentation). Based on an overview of recent research on adolescents' social media use and online self-presentation, it can be concluded that some aspects of sexualization, such as self-objectification and the increased emphasis on physical and sexual attractiveness, also occur in social media. However, we still lack knowledge on other aspects of online (self-)sexualization, such as the occurrence of sexual objectification-by self and others-and whether sexual content is inappropriately imposed upon adolescents in social media. Moreover, although there is initial evidence that the use of social media decreases self-esteem and sexual satisfaction, we still lack knowledge on whether the same consequences that are said to occur for sexualization in traditional media also occur for self-sexualization in social media. Suggestions for future research on (self-) sexualization in social media are given, which also pertain to the unique aspects of social media (i.e., peer norms and self-perception) compared to traditional media platforms. 1 (This chapter is an English translation of a Dutch journal article: Annemarie van Oosten (2016). "Sexy selfies": Over de rol van sociale media bij (zelf-) seksualisering onder jongeren. Tijdschrift voor Seksuologie, 40(2), 61-67.