Maamannan starring Udhayanidhi Stalin, Vadivelu, Fahadh Faasil in the lead has taken the 4th highest opening in Tamil Nadu with its day 1 box-office collections. The movie has grossed Rs. 8 Cr. (approximately) in Tamil Nadu alone, and the positive word-of-mouth and the weekend ahead looks encouraging for the film's box-office at this point. 

Maamannan day 1 collections is a career high for actor Udhayanidhi Stalin, who is also the producer of the movie. The movie is the lead star's last film as an actor.