In 1944, Mount Union felt that a fourth sorority was needed. Three outstanding girls, one from each of the other sororities, were chosen to help establish the new group. Local sorority Zeta Kappa Phi began in 1945, meeting in the basement of Miller Hall, a men's residence hall. Gamma Theta was installed on March 22, 1947. Chapter meetings were held in a garage behind Dussell House until 1950 when the present chapter house was completed. The house serves as a meeting place only with no living facilities. A highlight of their 25th anniversary celebration was a mortgage burning ceremony led by Grand President Maxine Blake. For their 50th anniversary, a tree was planted in the front yard. Carole Marlowe Gilbert served as an international officer as did Maresa Bass Taylor. They won the Golden Lion in 2007.