The story of 'Kambakkth Ishq' revolves around two individuals - Viraj Shergill (Akshay Kumar) and Simrita Rai (Kareena Kapoor) and the bitter-sweet relationship that they share with each other. Both of them are so different from each other, a part of two entirely opposite worlds, that whenever and however they meet, only one thing happens - fireworks! Viraj is a big-time Casanova, who works as a swaggering stuntman in Hollywood. As far as the opposite sex is concerned, he has only mantra in life - “women are only good for two things…making love & making love”.
On the other end of the spectrum, we have Simrita, a hothead who has the ability to stare down even the most arrogant male. If, by any chance, her stare does do the trick, she has sarcastic wit and derisive tongue to fall back on. She also has a mantra about the opposite sex - “all men are dogs”. So, what we have are two people, who are extreme opposites. However, life often tries to play jokes on them, putting them together in the most bizarre, but amusing situations. One fine day, Viraj and Simrita find themselves bound together in a manner unthinkable even in their wildest of dreams. What will happen now? Kambakkht Ishq?
* Akshay Kumar as Viraj Shergill
* Kareena Kapoor as Simrita Rai
* Aftab Shivdasani as Lucky Shergill
* Sylvester Stallone as Himself
* Amrita Arora as Kamini
* Javed Jaffrey as Keswani
* Denise Richards as Herself
* Brandon Routh as Himself
* Kirron Kher as Dolly Aunty
* Holly Valance as Herself (Special Apperance)
* Boman Irani as ENT Mental Doctor (Special Apperance)
In November 2007, producer Sajid Nadiadwala signed on actor Akshay Kumar to play the lead role in his film. Later that month Kareena Kapoor was signed on to play the female lead. It is the seventh time Kumar and Kapoor are paired together on-screen. Kumar plays a Hollywood stuntman in the film and Kapoor plays a high-society girl. According to Nadiadwala, "It will be an international love story on a lavish scale."
The project was originally expected to commence filming in January 2008 in Los Angeles, California with nine actors from Hollywood but due to extensive pre-production work on the film, it was later shifted to May 2008. Reports indicated that actor and politician Arnold Schwarzenegger was signed on to do a cameo and that the film would feature a performance from singer and actress Beyoncé Knowles. Prashant Shah, line producer of Kambakkht Ishq in L.A. commented, "...We are in talks with Beyoncé and we have also received a letter from Arnold's office...Things will be confirmed shortly and we will be making a formal announcement when that happens." It was later reported that both of the stars would not be appearing in the film.
In March 2008, Nadiadwala announced that "this would be the first Indian film to be shot within Universal Studios." However, when a fire broke out on the backlot of Universal Studios on 1 June 2008, the shooting of the film was expected to be delayed but the producer indicated, "...so far the area where we are supposed to shoot remains unaffected. So for now we are proceeding on schedule." Later that month, the cast finally began filming for the project in Los Angeles, California, where pivotal scenes were shot at the Kodak Theatre and Universal Studios. In August 2008, reports had indicated that the film was 50-60% complete and the cast would continue filming for the project in Venice, Italy. After completing their overseas schedule, the production team later headed to shoot in Mumbai, India.
During December 2008, reports surfaced indicating that Kumar and Kapoor would appear alongside Carmen Electra in a promotional music video for the film. In February 2009, Nadiadwala announced that Electra wouldn't be appearing in the music video and was replaced by the music group RDB. According to Nadiadwala, "It is not a music video but a song that we will use as an integral part of the film. It will occur close to the film's interval. It will also be the first promotional song." The first trailer of the film was shown alongside the release of Jehangir Surti's film Aa Dekhen Zara (2009).