I'll let you know on an auspicious day) is a 2018 Indian Tamil-language black comedy film, written and directed by P. Arumuga Kumar.

The film stars Vijay Sethupathi, Gautham Karthik, Gayathrie and Niharika Konidela.

Viji Chandrasekhar, Ramesh Thilak, Daniel Annie Pope, and Rajkumar play supporting roles.

The next day in a college event, Harish asks Yeman (who is waiting in the car to kidnap Soumiya) to help him in his love.

When he approaches her parents for a written statement, they deny the kidnap and says that Soumiya went to her grandmother's house.

In January 2017, Arumuga Kumar announced that his first directorial venture would be an adventure comedy film starring two lead actors and Gautham Karthik was revealed to be portraying the role of a college-goer.

Telugu actress Niharika Konidela also joined the cast making her debut in Tamil.

Vijay Sethupathi revealed that he was a friend of the director's, and inquired with Gautham Karthik if he was comfortable with a bigger actor joining the star cast, before confirming the project.

[4][5] During the promotional campaign for the film, the makers purchased the Ramnad Rhinos team for a celebrity cricket event held at Bukit Jalil Stadium in Malaysia during January 2018.

The film's audio launch was also held at the event, with the star cast barring Niharika, in attendance.

[7] Amazon Prime Video has acquired the digital rights of Oru Nalla Naal Paathu Solren.