The Delhi Metro is fast emerging as a favourite among filmmakers and Sunday it was the turn of superstar Amitabh Bachchan and his son Abhishek who spend over four hours shooting a sequence of the film Paa along with actor Vidya Balan.

The actor shot the sequence in a moving train, which travelled from Dwarka Sector 9 to the Yamuna Bank station and back. The Bachchans spent over four hours to complete the shoot for Paa, which is being directed by Cheeni Kum fame R Balki, a statement said.

"Yes!! I have travelled to Delhi. We shoot here for Paa, Abhishek and I. And I have to be up at 2.30 am to start my prosthetics for the shoot to start by 7 AM!!," Bachchan earlier wrote in his blog.

Earlier Subhash Ghai, Rakyesh Omprakash Mehra and Anurag Kashyap included the metro in films like Black & White, Dev-D and Delhi-6.

Not much is known about Paa, though the grapevines suggest that it will be a 'real life' role reversal for Bachchans as Big B will be seen playing Abhishek's son in the film.

Bachchan has given some hints about his "phenomenal" new look in the movie in his blog, stating that the make-up for his character takes four hours.

The film, co-produced by AB Corp and Reliance Big Entertainment.

- Hindu.com