The purposes of this article-based thesis are to explore and understand preaching as a practice in general, and the practice of preaching in digital culture and spaces in particular. Informed by the practice theory of Theodore Schatzki, it presents the results of a cross-case analysis of four different case studies of the practice of preaching in digital culture and spaces in Swedish protestant churches. Based on the analysis, Frida Mannerfelt argues that the deep relationality of the practice of preaching involves not just humans and texts but also material arrangements and that this feature often is amplified in digital culture and spaces. While there were examples of a decrease, overall, there was an increase in interaction, negotiation, and interdependency. In light of this, Manner-felt contends that the practice of preaching in digital culture and spaces is characterized by co-preaching. Moreover, Mannerfelt argues that some of the implications of co-preaching are the enabling and encouragement of dialogue, imagination, and the priestly function of the priesthood of all believers, but also an increased vulnerability for the co-preachers involved.