Mouni was born on 28th September 1985 in Cooch Behar, West Bengal, India. Her father Anil Roy was office Superintendent and mother teach in school. Her acting talent got from her grandfather Shekhar Chandra Roy, a well known theatre Artist. She completed her schooling from “Kendriya Vidyalaya” in Baburhat, Cooch Behar and graduated from the college “Miranda House” in Delhi. She also studied Mass Communication at “Jamia Millia Islamia University”. During her college days being a Kathak Dancer, she turns into a choreographer. She is an excellence dancer.