We provide a novel rational explanation for why cults of personality exist: they solve the dictator's adverse selection problem in assigning subordinates to roles within the regime. Participation in a cult of personality is psychologically costly whenever it involves preference falsification, with the costs varying across individuals. Importantly, low psychological costs of preference falsification are correlated with traits the dictator values, such as unscrupulousness and ruthlessness, which we collectively term disposition-based competence. Under a wide variety of circumstances, this correlation makes participation in cults of personality informative from the dictator's point of view, allowing him to hire loyal and competent subordinates for the most important regime positions. In contrast to earlier formal work, our model implies that dictators can use cults of personality to avoid the loyalty-competence trade-off when promoting subordinates.