Kasthuri is an Indian Tamil-language soap opera that aired on Sun TV from 21 August 2006 @ 6.30PM and later a show named replaced this serial 'Madhavi' on 19 April 2010 it shifted at 11.30AM this serial was replaced by Kanmaniyae and again shifted at 13 December 2011 on Monday through Friday at 11:00AM IST for 1532 episodes. The show starred Easwari Rao, Niya, Latha Sabapathi, Delhi Ganesh, Shyam, Neelima Rani, Aparna and Nithish among others. It was produced by Balaji Telefilms Ekta Kapoor and Shobha Kapoor, and had various directors. It also aired in Sri Lanka Tamil Channel on Shakthi TV.
The story of a village girl who marries a groom from the city. Ram is the groom and wants a modern and educated wife. While he and his parents come to this village to see Kasturi, unknowingly he sees another girl who is fairer near the well of the house. Thinking that she is Kasthuri (Easwari Rao), Ram says OK for the marriage, and they arrange the marriage. On the date of marriage, Ram is shocked to see the real Kasturi very dark in colour and not educated or looks modern. However, there is no choice for him other than to marry Kasthuri (Easwari Rao), so he marries her. Later he brings Kasturi to his residence in Chennai, Tamil Nadu.