Like many modernist engagements with the theme of outsider identity, Alexander Zemlinsky's 1921 opera Der Zwerg (The Dwarf) finds its dramatic nexus in the disabled body. In opera, such bodies are not only (historically) texted but also (presently) performed, with modern stagings offering a form of mediation between the historical and contemporary. With reference to two productions of Der Zwerg, this article unpicks aspects of the representation and performance of disability on the operatic stage. I first explore disability's simultaneous exaggeration and disappearance as a result of the problematic practice of ‘disability mimicry’. The effects of this practice and its proximity to issues of authenticity and embodiment are only made more tangible in the context of live performance, where attempts to embody disability's physicality are often sensationalised and unconvincing at best. However, disability can be, and is, represented in myriad ways. While disability mimicry can engender modes of perceiving disability from a voyeuristic perspective, these productions in fact make use of processes of ‘enfreakment’ to present disability through modes of theatrical production and aesthetic choice. This raises pertinent questions about why and by what means the disabled body is mobilised (or not) on the operatic stage, highlighting, moreover, disability's tendency to indicate meaning in registers beyond the body.