In early 2008, Boopathy Pandian first announced a project titled Naanum En Sandhyavum (Me and my Sandhya), with which he was planning to introduce his younger sibling Arjun Prabhu as an actor.

He signed him for the lead male role in the film, whilst Malayalam actress Meera Nandan was approached to essay the lead female character called Sandhya, for which reportedly also Kajal Aggarwal, Bhama and Vedhika were considered. Yuvan Shankar Raja was announced as the music director for film.

Following the announcement, however, there were no more news or any further details disclosed in the media and the film got shelved.
In early 2010 then, reports claimed that the director had completed a film titled Naan Avalai Sandhitha Pozhudhu (When I met her), starring newcomers and featuring Yuvan Shankar Raja's music. Boopathy Pandian had restarted the projects, changing its title and replacing the lead couple by two relatively unknown artists; Balaji Balakrishnan, who starred in the popular STAR Vijay television series Kana Kaanum Kaalangal and also appeared in the N. Linguswamy-produced 2009 film Pattalam, was signed as the male protagonist, whilst Meghana Raj, daughter of actors Sunderraj and Pramila, who was also earlier signed by K. Balachander for his long-delayed production venture Krishnaleelai, was roped in to enact the role of Sandhya.

The title of the film was later changed again to Kaadhal Solla Vandhen as disclosed by Balaji on his Facebook site. The film's shooting was primarily carried on in and around Perambalur, with major portions being filmed at the Dhanalakshmi Srinivasan Engineering College.

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