Abstract This article presents an overview of several significant aspects of the phonology of Uyghur (ISO: uig; pronounced [ʊjˈʁʊr]; Turkic: China). In addition to summarising previous research, we present new data and highlight its relevance for phonological theory. The paper focuses primarily on the processes of backness harmony, rounding harmony, and vowel reduction. Particular attention is paid to the complex, and sometimes opaque, interactions between these processes, as well as the role of phonological exceptionality.