Abhishek Bachchan and papa Amitabh Bachchan are shooting in Delhi, discretely trying to avoid too much public attention.

They were shooting for Balki’s movie, Pa in which surprisingly Amitabh plays Abhishek’s son who ages fast.

Big B’s character in the film suffers from a condition in which he ages at a faster pace and thus looks much older than his actual age and even older than his father (Abhishek).

The duo, along with Vidya Balan, earlier shot a couple of scenes at Rajpath. The scenes had Big B sporting a bald look, which was zealously guarded by the film’s crew from the cameras of the onlookers. Reports say the superstar has to sit for long make-up sessions to get the bald look.

The crew also shot in Metro train yesterday. They had got prior permission to shoot at the stations and inside the train. Several shots were canned at the Tagore Garden station on the CP-Dwarka route. However, some of the commuters had to wait at the Dwarka Sector 9 Metro station because they were kept out of bounds due to the shoot.