The film is being directed by Ashutosh Gowariker and the actor gave a sneak peek into his character by posting a picture on the microblogging site Twitter.
"One of my dreams when I first became an actor was to play a freedom fighter. Ashutosh made that dream come true with 'Khelein Hum Jee Jaan Sey', " he posted on the microblogging site.
"Surjya Sen was responsible for the Chittagong uprising in 1930. The film is based on the uprising, " he added.
Deepika Padukone also stars in the movie.