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
Principal at Banku's new school. He is extremely fond of students' lunch boxes. He is in for a ride when Banku and Bhoothnath pull a prank on him where whatever he speaks comes out as Gibberish.
Rajpal Yadav as Drunkard (Anthony)
He's a dare devil drunkard, who has the courage to stay at the haunted Nath, Villa, where no one even dares to come close. He sincerely wants to be of some help to Anjali, but ends up messing it all the more.
It's believed that children have the strongest connection to god. They have the ability to perceive goodness in everything and everyone. This is a story about a seven-year-old naughty yet innocent boy, who unknowingly turns a foe into a friend. This is a story about Banku and his friend, Bhoothnath...about innocence, honesty and the pure love of a child. It is believed a mother's love is selfless. But a child's love can transform relationships; it comes with no expectations and no boundaries. Their love can make you believe in miracles. A story about a little innocence, a little playfulness, and a lot of emotions that will touch hearts. This is a story that will show adults to see the world through the eyes of a child... an angel, a creation of god. It's then that one will realize what a beautiful world they live in after all.