How many movies have Karan Johar and Vishal Punjabi collaborated on?

They have worked on 1 movie together! Their first movie together was Main Hoon Na (2004) and was their highest rated movie together. They have not worked together since Main Hoon Na (2004).

Main Hoon Na (2004)

Crew
Costume Design
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Line Producer
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Casting Director
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Visual Effects Supervisor