Sushant Singh Rajput, who has his heads in the clouds currently owing to the success of 'MS Dhoni- The Untold Story', will be headlining as an astronaut in multi-starrer 'Chanda Mama Door Ke', directed by Sanjay Puran Singh Chauhan. The science-fiction adventure stars actors like Nawazuddin Siddique and Mohanlal in important characters. Also roped in is Maddy, who will play the role of a pilot.
