The movie revolves around Munnabhai a dreaded but good-hearted underworld don of Mumbai. Once while beating up one of his foes, he sees Komal and is so smitten by her beauty that he starts visualizing her wherever he goes and in whatever he does. Not understanding this new phenomenon in Munnabhai"s life, his men take him to Doctor Rastogi. The Doctor realizes it"s a love virus so he advises him to woo the girl somehow, not realizing that Munnabhai has fallen for none other than his own younger sister Komal. Munnabhai starts wooing Komal but she is in love with Raja, a local vagabond doing nothing except working in a bowling alley as a bouncer. It is not long before the doctor realizes that his underworld patient is in love with his own sister, so he decides to take her to Malaysia and get her married off...

Directed by: David Dhawan
Written by: Javed Siddiqui & Rumi Jaffery & Robin Bhatt
Release date: 2002-05-31
Runtime: 161 minutes
Cast:
Ajay Devgn Ajay Devgn
Raja 
Sanjay Dutt Sanjay Dutt
Munna Bhai 
Amitabh Bachchan Amitabh Bachchan
Dr. Malhotra 
Paresh Rawal Paresh Rawal
Commissioner 
Satish Kaushik Satish Kaushik
Pappu Pager