Past research has highlighted biases in how individuals are perceived based on gender and emotional expressions. Larson & Brodsky (2010) found that male expert witnesses were perceived more credible than female expert witnesses in a mock trial. Salerno et al. (2015) found that when expressing anger, men were perceived as more credible than their female counterparts. The current study explored how emotions and perceived femininity/masculinity of expert witnesses impact credibility in a jury decision making task. I hypothesized there will be a main effect of gendered appearance, with the masculine-faced expert seen as more competent. An interaction effect anticipates the feminine expert as being perceived as more competent than when displaying anger. Despite the importance of expert witness, little is known about how gender stereotypes and emotional expressions influence jurors' perceptions of credibility. Overall, This study adds knowledge to how emotions and gendered appearance impact expert witness credibility in cour