PurposeThe purpose of this paper is to examine the effect of pediatricians' obesity and gender on children's perceptions of physicians. In particular, to examine the extent and direction of obesity and gender on children's perceptions of likability, expertise, and trustworthiness.Design/methodology/approachThe study utilizes an experimental design. The actual sample is 138 children between six and 12 years of age.FindingsThe results indicate that physicians' gender did not influence children's perception of pediatricians' personal characteristics. However, physicians' obesity did influence children's perceptions. Specifically, obese pediatricians were judged less likable and less expert than non‐obese pediatricians.Originality/valueThe research informs two important gaps in the literature. First, personal characteristics influence perceptions of credibility, and children perceive obese persons negatively, just as adults do. Second, the paper lays out a rigorous experimental design that adapts scales and materials for use with child‐subjects.