Karan Johar arrived in Mumbai on Monday morning and it was reportedly a pretty busy time for him. For one, actors Ranbir Kapoor and Alia Bhatt dropped in at his office in the afternoon. Incidentally, Ranbir is involved with Karan’s, which is a film titled ‘Ae Dil Hai Mushkil’. And as for Alia, she is going to star in another film that is being produced by Karan’s banner, what will also star Varun Dhawan. And you may recall that Ranbir and Alia are yet to act in a movie together. The question now is, will they be seen in a film in the future?