This doctrinal thesis centers around the topic of voluntary human shields as a complex phenomenon requiring further scholarly attention. Specifically, this paper acknowledges that the actions of certain voluntary shields renders their classification as civilians strenuous, in which it is explored if the notion of Direct Participation in Hostilities might apply. As such, the research question contemplates: To what extent, if at all, can voluntary human shields be considered as taking a direct part in hostilities when shielding lawful targets?  The analyses have concentrated on both a theoretical examination of the ICRC’s Interpretive Guidance, and on an empirical investigation into two cases of voluntary human shields: the Serbian citizens in 1999 and the Palestinian women in 2006. Evidently, the findings indicate that voluntary human shields can to some extent take a direct part in hostilities, while the generalizability of our results are appreciated. Ultimately, this thesis provides additional insights into the topic, as increasingly relevant and required within the contradictory and existing research field, while also anticipating avenues for future research.