Kareena Kapoor, though eager to celebrate her birthday with beau Saif Ali Khan, will not be able to do so, claims sources close to her. The actress will be shooting for the final song in 3 Idiots and hence could not make it to the birthday bash planned by Saif.

Reportedly, 3 Idiots was supposed to have been wrapped up a month ago, but Aamir Khan’s domestic problems ensured that he took some time off with his wife and this stalled the film’s progress. However, the cast and crew of 3 Idiots, supportive and understanding his situation, preferred to wait until the actor returns after mourning his personal tragedy. The 3 Idiots team are working towards a December 25th release and producers hope to commence shooting from September 20th.