This contribution to Theatre Studies explores the shaping and performing of gender identity in British and Irish theatres since the 1980s. It highlights contact zones, conflict areas, and divergencies between the two theatre contexts with reference to historic, socio-political, and cultural clusters. Largely from a queer theory standpoint, this book reads several plays in their attempt to unmask exploiting mechanisms of sexuality and gender regulation. It focuses on alternative notions of sociality, shared spaces, and bodies, and offers political suggestions in order to resist confining notions of identity and gender.