Kylee Thiim was born on March 30, 1992 to Larry and Maile Tuileta in Honolulu, Hawaii. She is one of eight siblings, all of which play volleyball. She is a sophomore majoring in business management at Norfolk State University. Played varsity volleyball all four years at Sacred Hearts Academy under coach Derwin Tsutsui. Member of the 2006 Hawaii High School Athletic Association (HHSAA) State Championship team for Division 2 and also led the team to a runner-up finish at the Interscholastic League of Honolulu (ILH) Championship. Played club volleyball for Asics Rainbows Volleyball Club under Luis Ramirez, Imi Ike Volleyball Club under current UCLA head coach Mike Sealy and current University of the Pacific assistant coach Aven Lee.