Rani Mukherjee and Saif Ali Khan that made youthful romantic comedy ‘Hum Tum' a huge hit have been signed by Yash Raj films for a romantic film to be directed by Siddharth Raj Anand.

Interestingly, Anand had written the screenplay of ‘Hum Tum' along with Kunal Kohli, and had secretly hoped to direct Rani and Saif some day. Talking about the plot, Anand says he has moved ahead from the youthful, breezy, boy-meets-girl romantic comedy which was reflected in Salaam Namaste.

"I'm not moving away from the genre of romance, but this film will handle intense and mature emotions. I may sound serious, but the film will have all the essential ingredients for a typical Bollywood masala film," Anand said.

The film is scheduled to hit the floors in June. "The film will be shot in a start-to-finish schedule in a foreign location. I'm not going back to Australia this time. I'm looking for an urban and cosmopolitan city like New York. I should be able to figure it out in a month's time," added Anand.

Meanwhile, the director has taken a liking to Saif and wants him in all his films. The director says, "It's true that Saif is going to be part of all my films from now on. But I can assure you the chemistry between him and Rani is not going to be on the lines of Hum Tum, nor will it follow Salaam Namaste's live-in track. That's going to be the surprise package in the film."