Born in Seoul, South Korea, Hee Seo began her ballet training in her hometown at the Sun-hwa Arts Middle School. She was awarded a three-year full scholarship to continue her training at the Universal Ballet Academy in Washington, D. C. In 2003, Ms. Seo won a scholarship to train at the John Cranko Ballet Academy in Stuttgart. She is the recipient of the 2003 Prix de Lausanne Award and the 2003 Grand Prix at the Youth America Grand Prix Finals. Ms. Seo joined the ABT Studio Company in 2004 and the main Company in 2005, becoming a Principal Dancer in 2012.