The actress, who turned turned 32 today, plays Olympic medal-winning boxer Mary Kom in the biopic, which has been directed by Omung Kumar.
"For you, a sneak peak into the life of a true fighter... Full trailer coming soon. Can't wait to share it," Priyanka posted on Twitter along with the link of the 54-seconds teaser.
The film has been produced by Sanjay Leela Bhansali on a story and screenplay written by Saiwyn Quadras. 'Mary Kom' also stars Danny Denzongpa and will hit theatres on October 2.