The makers of Birthmark, starring Shabeer Kallarakkal and Mirnaa, released the first single from the film, 'Por Theeruma' on Wednesday. Composed by Vishal Chandrashekhar and sung by Shibi Srinivasan, the song has lyrics penned by Navin B. The song is a soldier's letter to his long-distance pregnant wife. 

Billed as a mystery thriller, Birthmark is directed by Vikram Shreedharan. He co-wrote the film with Sriram Sivaraman. The duo is also producing Birthmark. Birthmark also stars PR Varalakshmi, Indirajith, Porkodi, and Deepthie, among others. 

The technical crew consists of cinematographer Udhay Thangavel, art director Ramu Thangaraj and editor Iniyavan Pandiyan. Birthmark is produced under the Sapiens Entertainment banner. 

A release date for Birthmark is yet to be announced.