This experimental study investigated the impact of interface agent appearance (age, gender, “coolness”) on enhancing undergraduate females’ attitudes toward engineering. Results revealed that participants reported more positive stereotypes of engineers after interacting with a female agent. In contrast, participants interacting with a male agent reported that engineering was more useful and engaging. An interaction of “coolness” and age indicated that agents who were young and “cool” (i.e., peer-like; similar to participants) and agents who were old and “uncool” (stereotypical engineers) were both most effective on enhancing self-efficacy toward engineering.