Thea was born in Colorado Springs, Colorado on May 3, 1989. The youngest of five siblings, and the daughter of an opera singer, Thea and her sister, Anna Rubley, began performing at a young age. In order to continue her education in the arts, she enrolled as a BFA Theatre Major at the University of Southern California. She graduated in 2011, and currently lives in Los Angeles, actively pursuing a career in the arts.