Auditory verbal hallucinations (AVHs) are common in patients with borderline personality disorder (BPD). In contrast to patients with schizophrenia (SZ), research on AVH in BPD is scarce. In this chapter, we aim to provide a summary of the existing literature on AVH in BPD and place the findings within the wider context of AVH in SZ. Research on the neuronal correlates of AVH in BPD—structural and functional—is currently limited and heterogeneous, and studies with larger cohorts, control groups, and transdiagnostic approaches are needed to provide a clearer view on AVH in BPD. Nevertheless, the current studies propose a widespread involvement of key language network regions and suggest aberrant coupling within and between neural systems subserving language and self-referential processing. These results propose AVH as a transdiagnostic phenomenon with complex pathophysiological pathways that essentially involves speech, auditory, and cognitive systems, as well as contributions from self-referential networks.