Ranbir Kapoor, Anushka Sharma and Karan Johar are having quite a ball in Vienna with Ae Dil Hai Mushkil shoot. Photos and updates which the trio frequently posts on Twitter are an enough proof of this. As reported earlier, Aishwarya Rai Bachchan is set to join the unit in London soon. As per the recent update, the Jazbaa actress will take a flight from Mumbai on October 12.