The objective of this project was to train future physicians to work effectively and thoughtfully with diverse populations by teaching them to employ Acceptance and Commitment Training (ACT) skills to increase cultural humility, with the goal of improving attitudes, knowledge, and beliefs about working with diverse patients. We developed ACT for cultural humility online interactive modules as part of an elective course to teach Medical Spanish to 4th-year medical students. Pre- and post-pilot data pertaining to the cultural humility training modules on the Work-Related Acceptance and Action questionnaire, Multidimensional Cultural Humility Scale, knowledge, attitudes, and beliefs were analyzed using paired samples t-tests and Wilcoxon signed-rank tests. We also included descriptive data pertaining to overall satisfaction with the cultural humility modules and intent to apply the material learned to patient care. Our data showed a significant increase in the cultural humility of our participants as well as an increase in psychological flexibility, a higher favorability rating toward various ethnicities, improvements in attitude, and positive changes in beliefs and knowledge following completion of the modules. The modules were well received by the medical students, with high social validity ratings. The ACT for cultural humility curriculum has great potential to enhance medical education in diversity, equity, and inclusion by increasing both the understanding and the cultural humility of medical students and future professionals to work with diverse populations. The current paper provides a framework that can be used by other programs to shape the education of the future medical workforce to help promote culturally humble care.