Based on fieldwork in the United States, the article analyses the social construction of gender in contemporary OTO. The article addresses an important and often neglected area of study in research on Western esotericism, and discusses how the notion of binary gender is both created and challenged in interactions between OTO members. Thelemic divinity as presented in Liber AL is envisioned as consisting of a divine father, Hadit, mother Nuit, and Ra-Hoor-Khuit, their divine offspring. Despite the gender polarity constructed thus, contemporary OTO members stretch the boundaries of binary gender through a plethora of deities, personal gender performances and acceptance of different sexual orientations and lifestyles. The creativity and innovation of contemporary OTO members' gender constructions demonstrates the necessity of greater methodological diversity in research on Western esotericism, in order to allow an understanding of esoteric traditions as lived religions.