Although the collective view is receiving increasing attention in research, this perspective is missing from the approaches for fostering creativity and ideation. The present study aims to fill this research gap by understanding ideation as a collective phenomenon and by introducing a novel method for fostering collective ideation. The study builds on current research on knowledge creation, collective creativity, idea generation, and collective theatrical improvisation to introduce an approach for fostering collective ideation. In addition, as a secondary goal, the study provides empirical findings about the implementation of collective ideation in 13 distinct cases. The study builds links between knowledge creation and collective theatrical improvisation and, thus, highlights social and affective aspects of collective ideation as a knowledge creation.Post-print / Final draf