Her father was an ex-gunman at the Army and mother was a housewife. She started junior school with Buddhist Girls College in Mount Lavinia until grade 5 and then attended to Dehiwela Madya Maha Vidyalaya. At the school, she was an athlete and a strong netball shooter. She also completed all three stages of Kandyan dancing at school times. After finishing school, she enrolled with Indigenous Medical College for a four-year course. However, while studying at third year, Weerasinghe quit from medical college and entered cinema industry.
She was first married to late Tissa Abeysekara, who was a renowned director in Sinhala cinema. She has one son from her second marriage with Sarath Kongahage. Her son Devinda Kongahage is also a director in Sinhala cinema.