Deepika Padukone reportedly started shooting for her upcoming film 'Pathan' alongside Shah Rukh Khan on Monday. Reportedly, the shooting of the film is taking place at Yash Raj Films studios. 'Pathan' will mark Shah Rukh's return to acting after 'Zero' and will be his fourth film with Deepika after 'Om Shanti Om', 'Chennai Express', and 'Happy New Year'.