Born of Tamil parents, Krishnan and Uma Krishnan, Trisha had her schooling at Church Park School where former Chief Minister of Tamil Nadu, Jayalalitha pursued her school education. A graduate from Ethiraj College in Chennai, Trisha participated in several beauty pageants winning Miss Salem and Miss Chennai in 1999 and Miss India Miss Beautiful Smile in 2001.With beauty pageant titles to her credit, Trisha bagged number of modeling assignments from established brands like Pepsi, Fair & Lovely, Philips Power Vision, Brooke Bond Red Label Tea, Josco Jewellery, Vimal, Arun Ice Cream, Medimix soap, Butterfly, Junior Horlicks, Britannia cold coffee, Cavincare Meera Gold, Neem Toothpaste, Hercules cycle, and Goya Perfume from Colombo. A trained ballet dancer, Trisha appeared in Phalguni Pathak's video album, "Meri Chunar Ud Ud Jaya".
