Leah Donna Dizon was born in Las Vegas. Her mother is of French descent and her father is half Filipino and half Chinese. Her parents work as casino dealers. Dizon is the fourth of six children: she has two older brothers, an older sister, and two younger brothers. In an interview, she explains that she listened to rock and R&B music and trained in dance since the age of 12. Dizon has said that her mother was "very strict and monitored [Dizon's] spending habits". When she was 14 years old, she worked at a clothing store and eventually saved enough money to travel to Japan alone for a trip.