<p>This paper examines human digital twins (HDTs) as posthuman mimetic assemblages. Drawing on Rosi Braidotti’s conception of posthuman subjects as zoe/geo/techno assemblages and Bernard Stiegler’s analysis of technological supplementation, we analyse how HDTs represent a data-driven form of mimesis that extends beyond traditional human–technology relations. While HDTs emerge as dynamic networks integrating vital, infrastructural, and computational elements, they simultaneously serve as instruments of techno-plutocratic control through surveillance and datafication. The paper argues that this technological attempt to ‘complete’ the human through digital replication produces a ‘stuplime’ (Sianne Ngai) effect. In this posthuman sublime, the excess of digital replicas overwhelms our capacity to process these datafied versions of self. This analysis reveals how HDTs, as posthuman mimetic assemblages, exemplify the complex entanglements of contemporary human–technology relations. The study also looks into digital identity and algorithmic governance in the context of postphenomenological inquiry.</p>