Amitabh Bachchan as Bhoothnath (Kailash Nath)
His 'imaginary' friend, Bhoothnath is his partner in crime. Bhoothnath, who initially is reserved and irritable in the film, transforms when he finds a grandson in Banku. He shares a very special relationship with Bhoothnath. The two are inseparable. They play a lot of pranks at school and home. The bond between them personifies love and innocence.
Aman Siddiqui as Banku (Aman Sharma)
Perfect Dennis the Menace…he loves to play pranks, make up stories and trouble his mom. His innocence is deceiving. Since he has moved to Nath Villa, he's made a special friend. Bhoothnath!
Juhi Chawla as Mom (Anjali Sharma)
She is an easy going, fun and a really lazy person. Doing chores at home isn't her cup of tea…She and her son have a lot of fun at home. They play and laugh all the time.
Satish Shah as Principal Irani