The shape of alliance in psychotherapy and supervision using growth curve modeling was examined for clinically inexperienced trainee therapists, who were engaged in long-term cognitive behavioral--or psychodynamic individual psychotherapy at a Psychology Clinic in Sweden. Trainee therapists rated their view of the alliance with their clients and their supervisors on the Working Alliance Inventory at five time points. The alliance to the client show a consistent, positive development throughout the therapy. The alliance to the supervisors show initially a decrease, followed by an increase, and then again, the rate of increase in the supervisory alliance ratings slowed down indicating a more complex view of the supervisory alliance compared to the view of the alliance in psychotherapy.