With the past 20 years of increasingly pervasive digital technologies in educational and societal contexts, young people’s development of digital citizenship has become important to participate and act as members of society. To this end, schools have an important role, and new teachers need to be prepared through the support of teacher educators. Focusing on their dual-didactic role, this lightning talk highlights opportunities and challenges for teacher educators’ professional digital competence (PDC) to teach for digital citizenship. Using examples from the Swedish context, the talk highlights tensions in teacher educators’ PDC where their understanding of digital citizenship may be broadly compatible with the postdigital but less nuanced in the context of education. Similarly, teacher educators may have PDC to teach about digital citizenship but feel ill-prepared to teach teaching for digital citizenship, where further complexity comes from the strive to have PDC that is responsive to postdigital developments in society. The lightning talk draws attention to the opportunities of using a postdigital lens to support teacher educators’ PDC to include a deep conceptual understanding of digital citizenship, which is important for the preparation of future teachers and, in turn, young people’s development of digital citizenship.