Milenge Milenge co-stars the ex-lovers, who ended a three-year relationship in 2007.
Shooting began in 2004, but the film has been besieged by delays, as well as rumours that the former couple refused to work on its post-production.
It is reportedly based on the romance Serendipity.
Producer Boney Kapoor told the Hindustan Times: “Shahid shot for the video, but I am yet to get a nod from Kareena. I think she is busy shooting for Golmaal 3. I am waiting for her to get free.