The current research investigates how facial appearance can act as a cue that guides observers' feelings and moral judgments about social exclusion episodes. In three studies, we manipulated facial portraits of allegedly ostracized persons to appear more or less warm and competent. Participants perceived it as least morally acceptable to exclude a person that appeared warm-and-incompetent. Moreover, participants perceived it as most acceptable to exclude a cold-and-incompetent looking person. In Study 2, we also varied the faces of the excluding group (i.e., the ostracizers). Results indicate that typical ostracizers are imagined as cold-and-incompetent looking. Study 3 suggests that the effect of a target's facial appearance on moral judgment is mediated by feelings of disgust. In sum, people's moral judgment about social exclusion can be influenced by facial appearance, which has many implications in intergroup research, such as for bystander intervention.