How many movies have Aamir Khan and Nitin Chandrakant Desai collaborated on?

They have worked on 7 movies together! Their first movie together was Pehla Nasha (1993) while their highest rated movie together was Lagaan: Once Upon a Time in India (2001). They have not worked together since Mangal Pandey - The Rising (2005). They are most known for their drama films together.