The film is scheduled to release in June 2012.
Said Priyanka: "Initially, when I came to Mumbai I used to travel in local trains a lot. So, it felt nice that trains haven't changed, the public has not changed. So it was a good experience."
Both the actors and director Kunal Kohli were promoting their film Teri Meri Kahaani. They first boarded a local train to reach Jai Hind College, Churchgate, and from there they went to Oberoi Mall to launch Opium eyewear in a car.
Reportedly, the whole train was booked for Rs. 500,000
Kohli flaunted his funny side by saying, "We hope Teri Meri Kahaani is a superhit. We have just shown three births and it is a time of sequels. So if the movie is a hit, I'll show four more births in the next film."
Earlier this year, actress Vidya Balan also undertook a similar promotional medium for her film hit film Kahaani.