Filmmaker Sajid Khan has revealed that Rajkumar Hirani wanted him to do the role of 'Circuit' in 'Munna Bhai MBBS', which was later played by Arshad Warsi. "My biggest regret in life, later, was not meeting Rajkumar Hirani," he added. Sajid further said, "I don't think I can be a lead actor, but a strong character actor."