Katie Gallagher was born in Kansas City, Missouri. She grew up in the city of Lenexa, Kansas with her parents Michael and Linda Gallagher, and her older sister Laurie. She grew up as a competitive dancer training in all styles of dance. She received a Bachelor of Science in Industrial Engineering from the University of Arkansas, and taught at a local dance studio while in school. She later moved to Phoenix, Arizona where she danced on the NBA Phoenix Suns Hip Hop Squad for two seasons and the WNBA Phoenix Mercury Hip Hop Squad for one season. She also experienced a major weight loss transformation during her time in Arizona through weight training and adopting a healthier way of eating, and she loves to inspire others to live a healthy lifestyle to this day. Her deep-rooted passion and love for dance is what initially brought her to move to Los Angeles, where she then discovered her interest and passion to get into acting. Katie currently resides in Los Angeles where she constantly works to grow as both an actress and a dancer.