She has won a Filmfare Best Supporting Actress Award (Tamil) for her performance in Unnai Ninaithu (2002) and also received the Tamil Nadu State Film Award for Best Actress twice, in 2001 for her performances in the films Virumbugiren, Aanandham, Punnagai Desam and later for Pirivom Santhippom (2008). She has also won Nandi Special Jury Award-Telugu for her performance in the movie, Radha Gopalam.
Sneha was paired with Prasanna for the first time in Achchamundu! Achchamundu! (2009). Since then, there were numerous reports in the media on their affair. Prasanna was spotted in all her modeling shows and both were spotted together in Movie Previews. Though, both declined it as rumour, later, on November 9, 2011 Prasanna announced, "Yes... Sneha and I decided to marry soon with the blessings of our parents. The engagement will be announced later. Someone has mentioned that our marriage would be in March 2012. There is no truth in that report. We have planned to announce our marriage date properly later on. Till then, please wait and thanks for all!" through his PR. Sneha, later acknowledged the same on November 16, 2011. They got married on May 11, 2012 in Chennai. They went to New Zealand for honeymoon. Prasanna added, "We were unable to go for honeymoon immediately after our marriage, since Sneha had to shoot for her upcoming film Haridas. A couple of weeks ago, we got some time and left for New Zealand. Sneha has not accepted any new offer since she wants to focus on family."