This was the first investigation of individual differences in adopting deceptive universal emotional expressions. We hypothesized that psychopathic traits would lead to a heightened ability to suppress emotional expressions and exhibit less ‘‘leakage’’ of inconsistent emotions during deceptive displays. Further, we predicted that emotional intelligence (EI) would lead to a heightened ability to simulate emotional expressions. Participants (N = 100) viewed emotionally arousing (happy, sad, fearful, disgusting) images, responding to each with a genuine or deceptive expression. Each video frame (30/sec) was coded for emotion (in)consistent with the intended expression (365,550 frames coded for 2437 expressions). As predicted, psychopathic traits – specifically, high levels of interpersonal manipulation – were related to shorter durations of unintended emotional ‘‘leakage’’ during deceptive expressions. In contrast, the erratic lifestyle element of psychopathy predicted greater emotional inconsistency during deceptive displays.