Auro suffers from a progeria like syndrome. Mentally he is 13 but physically he looks 5 times older. In spite of his condition, Auro is a very happy boy. He lives with his mother Vidya, who is a gynaecologist. Amol is young, progressive politician. He is a man with a mission. Auro is Amol's son. Paa is a 'rare' story about a father-son, son-father relationship.
Amitabh Bachchan
as Auro
Abhishek Bachchan
as Amol Arte
Vidya Balan
as Vidya Arte
Paresh Rawal
as Mr. Arte
Arundathi Nag
as "Bum"(Vidya's mother)
Swini Khara
as Pratik Katare
Jaya Bachchan
as Narrator
Taruni Sachdev
as Student
Olivier Lafont
as Sagar
Rajiv Kachroo
as