Mouni Roy was born in West Bengal to Mukti, a theatre artist, and Anil Roy, a Cooch Behar Zilla Parishad office superintendent. She studied at Kendriya Vidyalaya in Baburhat, Cooch Behar, and then pursued mass communication at Jamia Milia Islamia, Delhi.
Her acting career began in 2006 with the serial Kyunki Saas Bhi Kabhi Bahu Thi, a family drama by Ekta Kapoor, in which she played the role of Krishna Tulsi opposite Pulkit Samrat. She participated in and won the first season of Zara Nachke Dikha.
Roy's subsequent roles included Kasturi (2007),Pati Patni Aur Woh (2009),Do Saheliyaan... Kismat Ki Kathputaliyaan (2010),and Hero Hitler in Love (2011). In 2011, she also played the role of Sati in the highly acclaimed mythological show Devon Ke Dev... Mahadev.
In 2014, she was a contestant on Jhalak Dikhhla Jaa, Season 7, the dance reality show on Colors. The following year, she got another break from Ekta Kapoor's Naagin, a supernatural series, in which she played the role of Shivanya.
She made her debut in the Hindi movie industry with the movie Gold (2018) opposite Akshay Kumar. The movie was a huge commercial success and earned Rs.1.5 billion.
In 2019, she appeared in Romeo Akbar Walter with John Abraham and Jackie Shroff. In the following year, she appeared in her first OTT feature film London Confidential, in which she played the role of a pregnant spy named Uma Kulkarni.
One of her best performances came in 2022 when she appeared as Junoon in Brahmastra Part One: Shiva, along with Ranbir Kapoor, Alia Bhatt, and Amitabh Bachchan. She got rave reviews from her fans and critics for her performance in the blockbuster movie.
Mouni Roy has won numerous awards for her performances, including the Best Actress at the Indian Television Academy Awards, Gold Award for Naagin, Nickelodeon Kids' Choice Award for Best Smile of the Year, and IIFA Awards for Best Supporting Actress for her role in Brahmastra Part One: Shiva.
