Shekhar's (Raj Kapoor) maternal grandmother Nani (Lalita Pawar) is a very loving person, and loves Shekhar dearly as a mother. She is also very religious and firm in her beliefs. She believes that every man must have a male heir to carry on the family's name. Therefore, she will only permit Shekhar to marry a woman who will bear him a son. Shekhar presents his Nani with Sunita (Waheeda Rehman), the girl he plans to marry. Nani finds out that Sunita cannot bear any children and disapproves of her. Shekar and Sunita marry anyway, and to pacify Nani, pretend that a friend's son is theirs.
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Shooting had initially started in 1959 with Madhubala as the female lead, but her heart ailment curtailed her career and she left the film incomplete. Her scenes were entirely reshot with Waheeda Rehman as her replacement. Read More