Priyanka on Sunday night shared a photograph of the film's draft on her Instagram stories. The draft also mentioned that the film is written by Bose.
She captioned it: "And it begins... Prep. Hindi movie."
The Mary Kom actress later posted a photograph of herself in a car enjoying looking at the Mumbai rains.
The Sky Is Pink reportedly revolves around Aisha Chaudhary, who became a motivational speaker after being diagnosed with pulmonary fibrosis at the age of 13.
Bose has previously directed films like Amu and Margarita with a Straw. She even produced the 2012 film Chittagong.
Images: Priyanka Chopra's Instagram Page