As part of the film's promotion, the producers painted two full local trains in Mumbai from the Western and Central lines with imagery from the film, with Shahid Kapoor present to chat with fellow passengers and inform them about the movie.
A private screening of the film was organized at Yash Raj Studios in Mumbai for those associated with the film and their families on October 23rd, 2007.
Shahid leaves Mumbai in Punjab Mail from Chhatrapati Shivaji Terminus (CST). Punjab Mail takes the central route and reaches Delhi via Itarsi, Bhopal. But in the movie, the train takes the Western route via Ratlam, Kota.
Microphone is visible in the reflection of the mirror when karina's mom is asking karina about how she has been, when she came back to home after 9 months!