Early life:Krishnan was born to Tamil parents, Krishnan and Uma Krishnan, in Chennai, Tamil Nadu. She attended M.S.E.C College in Ramnad and later studied at Sacred Heart Church Park School, Chennai. In school, she participated in several cultural activities, sports and school band. While studying in M.S.E.C college, she ventured into part-time modeling and participated in various beauty pageants. She converses fluently in Tamil, Telugu, Hindi & English. As part of her modeling career, she appeared in many TV advertisements including that of Fanta, Tata Indicom and Vivel ITC. She also appeared in Falguni Pathak's music video Meri Chunar Ud Ud Jaye as Ayesha Takia's friend dancing in the video.