Paa is the family entertainer and deals with relationship between father and son.Though this filim had revealed about the story of son,His name is Auro.He is 13 years old and very intelligent boy.Due to the rare genetic defect that causes accelerated ageing.Auro looks like a old man in his young age due to the genetic defect,he suffers from progeria like syndrome.
Auro(Amitab Bachan) mentally 13 years old,but physically he attains a old man age.Auro is a very happy boy. He lives with his mother Vidya (Vidya Balan), who is a gynaecologist.
Abishek bachan played a father role,his son is Auro.His name in the filim is Amol Arte,he is young, progressive and a full of ideals, politician. He is out to prove to the world that 'politics' is not a bad word.
Vidhya Balan is the finest actress we have today. She can play mature roles as well as exhibit childish qualities in her.