In a casting coup of sorts, Zoya Akhtar has upstaged Karan Johar at his own game and signed Hrithik Roshan, Kareena Kapoor, Ranbir Kapoor and Katrina Kaif for her forthcoming film. The film that traces the relationship between a brother and sister, to be played by real life cousins Kareena and Ranbir Kapoor, will also star Katrina Kaif opposite Ranbir. It is said that Zoya wanted to visit the online chemistry of Hrithik and Kareena, they having already featured in Rajshri’s Main Prem Ki Diwani Hoon in 2003. And since Hrithik has already worked with Zoya, he welcomed the offer. Katrina, on the other hand, too has expressed her wish to work with Ranbir. Their chemistry,be it in Ajab Prem Ki Gazab Kahaani or Rajneeti has been a matter of tremendous appreciation. The project is expected to go on floors by the end of next year (2013).