Priyanka was shooting for Saat Khoon Maaf and the scene she was canning that day required her to be dressed up as a 65 year old woman.
Expert make up artists, who were specially flown in from abroad, had aged her face, hands and even feet to make her look like an old woman. Priyanka's parents were unaware of this, and did not recognize her at all. It took some convincing on the actress's part before her parents realized they were talking to their daughter.
In Saat Khoon Maaf, Priyanka's character ages from 18 years old to 65 years old.