The first women to join the fraternity were sisters of the Sigma chapter of Tau Beta Sigma at Arizona State University, who merged with the Beta Omicron chapter of Kappa Kappa Psi after a unanimous vote of both organizations. These women were Patricia A. Childress, Lydia L. Lennon, Leslie A. Anderson, Mary L. Duffala, Mary M. Ketterer, Kristina M. Zipsnis, Clara M. Bertilson, and Toni Ryon, who were initiated into Beta Omicron on August 26, 1977. On August 27, Lea F. Fuller was initiated. The first woman to participate in the formal probationary membership process and become a member of Kappa Kappa Psi was Darragh Hill Young, who was initiated into the Beta Tau chapter at Wichita State University on September 1, 1977.