'Udta Punjab', directed by Abhishek Chaubey, also stars Shahid's former girlfriend Kareena Kapoor Khan and his 'Shaandaar' co-star Alia Bhatt.
"Scariest part I have played yet have no clue how I'm going to get it right. Wish me luck guys," Shahid, 33, posted on Twitter.
It is still unclear whether Shahid and Kareena, 34, will share screen space together or not. The duo last worked together in rom-com 'Jab We Met' in 2007.
The movie, written by Chaubey and Sudip Sharma, is said to have three parallel stories.