Nirosha was born on 13 January 1973.She is native of Kandy, Sri Lanka She was married to Nalinda Sampath in 2000, but the couple got divorced in 2005. She married Yasantha Nimalatheja in 2009.she is beautiful women
Nirosha has sung songs in Sinhalese, Tamil, Hindi, and Malayalam.
In 2000, 2002 and 2016 she was awarded as Best Female Vocalist at President's Award and Sarasaviya Awards for her contribution as a playback singer of the films "Rajya Sevaya Pinisai" and "Kinihiriya Mal" respectively.