The present study investigates individual improvisation and perceived other person’s affective passion and cognitive passion as predictors of short-lived co-creation in a dyad. The study takes a quantitative survey research strategy. Suggested research model was tested utilising SEM-PLS analysis with the dataset comprising 336 respondents. The data were collected from twelve co-creative events during 2017-2019, in which participants conducted a highly creative co-ideation task within limited time in dyads. The results show support for our hypotheses. Specifically, we find that individual improvisation and perceived affective and cognitive passion directly affect co-creation. In addition, we found that cognitive passion moderates between improvisation and that moderation is negative. We discuss theoretical and managerial implications of our results.