Aishwarya Rai Bachchan is busy shooting for her upcoming film 'Ae Dil Hai Mushkil' and this film is directed by Karan Johar. karan Johar enjoys to work with Aishwarya. Very close in personal life, Karan and Aishwarya for the first time is doing any film. Ranbir Kapoor, Fawad Khan and Anushka Kapoor will also be seen in the movie. Karan wished Aishwarya on her 42nd Birthday on twitter. He wrote, "Working with Aishwarya is quite incredible...Very happy birthday. Aishwarya celebrated her Birthday in London on the set. Film will release on 28 October next year. Ajay Devgan's 'Shivaay' will also release on the same day.