Mohabbatein (2000)
Cast: Amitabh Bachchan, Shah Rukh Khan, Aishwarya Rai, Uday Chopra, Jimmy Shergill and Jugal Hansraj, Shamita Shetty, Preeti Jhangiani and Kim Sharma
Director: Aditya Chopra
Diwali in Hindi movies usually signifies either a separation or a union. In Mohabbatein, it is union for three couples: Uday Chopra, Jimmy Shergill and Jugal Hansraj with their girlfriends Shamita Shetty, Preeti Jhangiani and Kim Sharma respectively.
The three men go against the rules of a school named Gurukul -- run according to the strict rules laid down by its headmaster Amitabh Bachchan -- which demands that students cannot fall in love.
But Shah Rukh, playing one of the teachers, encourages them to follow their heart. During Diwali, the three men sing Pairon mein bandhan, which unites them with their sweethearts.
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