"I've been on a put-on-some-serious-weight kind of diet for 'Saat Khoon Maaf"... yuck! I feel so unhealthy!" the actress posted on her Twitter page.
The 27-year-old is now waiting to hit the gym.
"Now that the film is almost over... I plan on hitting the gym with a vengeance... And coming from me that's a feat in itself... because I hate gyms! Aaaarrrggghh!!" she wrote.
Based on Ruskin Bond's story "Susanna's Seven", "Saat Khoon Maaf" is about a femme fatale who bumps off her seven spouses and Priyanka plays that role with seven male actors including Naseeruddin Shah, Irrfan Khan and Neil Nitin Mukesh.