Mona Lisa may star opposite her favourite hero Shah Rukh Khan in her favourite director Karan Johar ’s next production.The film is reported to be set in set in New York and is an 'unusual' love story and will be directed by Siddharth Malhotra who's presently writing the screenplay of the film.Malhotra has previously assisted Johar in Kal Ho Na Ho . Johar has approved the script and Malhotra is writing it out now. The rest of the cast would be finalised in a month's time.All know that Lisa has been very keen on working with her favourite director (Johar) for a long time, after a period of fallout.Be it interviews or brief appearances on television, Lisa has been vocal about her aspirations. Lisa has been in talks with Johar for sometime for various projects. But nothing has really materialised. Johar, however, refuses to spell the name of her leading lady. When quizzed about Kareena, he says she hasn’t been confirmed yet. the film though is a one-guy-one-gal romantic film." Lisa is yet to sign on the dotted line, but she has been more or less finalised for the role says a source.