The 73-year-old tweeted on Sunday night: "And in Delhi now, with grown beard for role of new project that starts tomorrow."
The "Piku" star also mentioned that he is facing "massive apprehensions and fears" as he starts the new project.
"Right now it is my stay, for the new film which starts tomorrow under the Shoojit Sircar banner... And as always there are massive apprehensions and fears as is won't at the start of a new project (sic)," the thespian wrote on his blog.
In the image shared by Big B, he can be seen wearing a grey cardigan and white shirt. He also sports a full beard unlike his usual French beard style, and glares.
"Actually that is my travel gear into the city of Delhi, but most of what you see shall be the face of the film in my character. Getting under those glares was quite a revelation... Had not done this for quite many years, but today," Big B described his look from the film.
"Eve" marks the first Hindi film of National Award-winning Bengali director Aniruddha Roy Chowdhury.