Independence and objectivity are key principles assumed to underlie internal auditors' fraud-risk judgments. However, a substantial body of evidence suggests that physical attractiveness of suspects may influence internal auditors' fraud-risk judgments. In this experimental study we investigated whether internal auditors are susceptible to appearance-related biases, or whether they correct for them due to their expertise and motivation. A total of 193 internal auditors were presented a misappropriationof-assets scenario in which the attractiveness of a suspect was manipulated. To determine whether professional expertise is associated with increased resilience to appearance-related biases, their fraud-risk judgments were contrasted with those acquired from 240 subjects without auditing experience ("naive subjects"). In line with our predictions, attractiveness modulated naive subjects' fraud-risk judgments, whereas internal auditors did not show any indication for appearance-related biases.Our findings suggest that internal auditors' experience and motivation may immunize them to the phenomena of physical attractiveness stereotyping and the attractiveness halo effect.