Main Prem Ki Diwani Hoon (English: I am crazy about Prem), is a 2003 Indian Hindi-language romantic comedy drama film by Sooraj Barjatya and produced by Rajshri Productions. The film is a reboot of the 1976 film Chitchor and features Hrithik Roshan, Kareena Kapoor and Abhishek Bachchan in lead roles. It had a nationwide release on 27 June 2003 to negative reviews, and was commercially unsuccessful at the box office.

However, Bachchan's performance was well received and earned him a nomination for the Filmfare Award for Best Supporting Actor at the 49th Filmfare Awards.

Roshan's and Bachchan's characters, as with the protagonists of every Sooraj Barjatya film until Uunchai, are named Prem. The film also became the last collaboration between Roshan and Kapoor out of their four collaborations as onscreen pairings while it turned out the first of their two collaboration between Roshan and Bachchan before Dhoom 2. It also marked the second collaboration between Bachchan and Kapoor after their debut film Refugee out of their three collaborations together.