The 31-year-old actress, who has shared screen with some big film stars including Kamal Haasan and Akshay Kumar, announced the news of her engagement a couple of days ago.
The couple got engaged at a ceremony attended by close friends and the wedding date is expected to be announced later.
Manian runs film production firm Radiance Media Group which has produced Tamil movies 'Vaayai Moodi Pesavum' and 'Kavviya Thalaivan.' Besides, Manian also runs Radiance Realty.
On whether she would quit the film industry post marriage, Trisha had said, "I have no intentions of quitting films. In fact I will be signing two new films soon and looking forward to four of my releases in 2015."