Abstract. In this paper we address how interaction design and agile development work together, with a focus on the issue of interaction design being done “up-front”, before software development begins. Our study method used interviews with interaction designers and software developers on several agile teams. We used the qualitative approach of grounded theory to code and interpret the results. Our interpretation includes appreciation for benefits seen for a certain amount of up-front interaction design, and benefits from some levels of interaction design continuing with the iterations of software development.