Prithviraj gained weight to 98 kilograms and then reduced to 67 kilograms for his role.
The making of the movie spanned an unreal 16 years. Blessy was focused on the single project and went without making any other movie for that long.
Prithviraj survived on heavy fasting for his character where he would only drink water and black coffee.He would sometimes go on to fast for 72 hours.
Adaptation of best selling Malayalam novel of same name by Benyamin
For a nude scene in the film he fasted for three days without even having water.While shooting for that scene he had 300ml of Vodka and had to be lifted on a chair till the location.