In the Spring of 2001, the sisterhood of Sigma Omicron Pi recognized twelve exceptional women from the University of California, Irvine, as their Theta Chapter. This story began more than a year before as these girls joined together with the shared desire of eternal sisterhood to establish this eighth chapter as the first in Southern California. These women sought out a sisterhood based on friendship, trust and loyalty that could match the dreams that they saw within each other. In order to make this dream a reality, these 12 women willed together their determination, heart, and minds, and dedicated themselves to their goal.

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As group of young freshman, these women began their journey to Sigma Omicron Pi in March of 2000. Their perseverance led them to being granted Charter Pledge Class status on November 18, 2000. All existing chapters of Sigma Omicron Pi took part in teaching this Theta Chapter, Charter Pledge Class, exactly what it meant to be a part of such a strong sisterhood. The sisters of SOPi instilled within this class, a foundation passed along through over seven decades of sisters, from which Theta Chapter was to be built upon. The Charter Class learned not only unity, friendship, leadership, and service as the objectives of Sigma Omicron Pi, but they also came to understand the true meaning of these words from the many lessons taught by the sisters.

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Under the guidance of their Gamma Chapter based pledge coordinator Kelly Morrow, Theta Chapter's Charter Pledge Class completed their pledge period and crossed into the sisterhood of Sigma Omicron Pi on March 31, 2001. Their goal had been reached, and their expectations for an eternal sisterhood and lifelong friendships had been surpassed by the reality of what Sigma Omicron Pi had to offer to all of its sisters. Their lives had been changed by this unmatchable learning and growing experience, and they set forth to making the Theta Chapter experience as strong and powerful to all women who crossed into its house, as it had been for these first twelve in Charter Class.