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.

She put her legs in small screen with the famous television drama “ Kyunki Saas Bhi Kabhi Bahu Thi” aired on Star Plus. Her character was Krishna Tulsi. She then signed another famous serial named “Devo Ke Dev …Maha Dev”where is played a role of Sati. The story of most a powerful God “Lord Shiva”. She gets recognition by the show. Later she worked in many dance and television drama like Kasturi, Dance Pe Chance Reality show Tolly vs Bolly, Tyohaar Dhamaaka, aired on 9x Channel and also Pati Patni aur Woh with Gaurav Chopra. She also worked in Punjabi movie named “Hero Hitler in Love” as a Sahiban. She was participated in most celebrated show “Jhalak Dikhla Jaa” season 7. She was last seen in television drama “Junoon –aisi Nafrat to Kaisa Ishq” a different kind of love story aired on Life OK.