Apasiri Nitibhon, nicknamed Um, is a Thai supermodel and actress. She is the younger sister of Amarin Nitibhon, a Thai singer and actor. She entered the entertainment industry by becoming a model at the age of 18 after the 'Trend Setter' contest. Likewise, Apasiri then took photoshoots for magazines and became well known in the modeling industry in the 1990s with a unique face and 173 centimeters tall.