Positive psychology (PP) is the study of the role of positive emotions in optimizing performance. In response to a dearth of research on harnessing the potential of PP in enriching language teacher education, the present study aimed at integrating PP into an English as a foreign language teacher education program to assess its effects on the development of positivity among teachers and possible improvement in their instructional practice. To that end, first the PERMA-Profiler was administered to 25 teachers, who were about to attend a teacher training course. The results of this phase revealed the need for an intervention to raise three focal participants' awareness of the tenets of PP since they scored below the mean on the scale. During the second phase, the three focal participants were trained in the principles of PP for six weeks. They were also asked to write reflections about the instruction they received on a weekly basis. Thematic analysis of their reflections indicated that the teachers formed positive emotions, engagement, relationship, meaning, and accomplishment, which resulted in their enhanced instructional practice. Moreover, the participants believed that the intervention helped them actively engage with the main teacher training course. The findings imply that PP has the potential to enrich teacher education programs.