Born to Krishnan and Uma Krishnan in Palakkad, the Tamil Iyer actress got her early education from Church Park School and pursued her higher education in Ethiraj College, Chennai. Later, she modelled and won Miss Salem in 1999, Miss Chennai in 1999 and Miss India Miss Beautiful Smile in 2001. In school, she participated in several cultural activities, sports and school band. Trisha is said to be a good ballet dancer. She studied in the same school as former Tamil Nadu Chief Minister J.Jayalalitha