On April 20, 2012, the fifteen founding members came together from various student organizations across campus with one mission in mind: to unite female leaders across campus through the three pillars of leadership, sisterhood, and service. 

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Over the first five months, these fifteen women established the organization's foundation and constitution. In September 2012, Aggie Belles became an official Texas A&M University student organization and began its first new member selection process. Over 300 women applied to become members, and the staff selected 50 new members to commence their first year.