Casey has always had a love for acting, singing, and performing. As a child, she would sing in the choir at her church and starting acting in local musical theatre productions when she acquired her first-ever role as Brigitta in "The Sound of Music" at age nine. This sparked a career of performing for Casey and a normal day would usually end with a rehearsal of some kind. Throughout the years, Casey has played many parts in musical theatre productions, such as Mary Lennox from "The Secret Garden," Lady Larken from "Once Upon a Mattress," Sarah from "Guys and Dolls," Lili in "Carnival!," and many more. She even played Maria in a production of "The Sound of Music" as a young adult.