The entry scene of Mithila Palkar, where she comes out of boys hostel, the name written addressing hostel is Father Lankester Merrin Boys Hostel. It is direct reference to 1973 cult horror classic the exorcist. The Father's name, who performs Exorcism on Regan McNiell in the movie is Father Lankester Merrin.
Before Malayalee actor Dulquer, Irrfan Khan collaborated with another famous actress predominantly working in Malayalam movies,Parvathy (Qareeb Qareeb Single); coincidentally both Karwaan and Qareeb Qareeb Single revolves around a road trip and a journey to self discovery.
Irfan Khan was away from the country when the film released .As he was in London undergoing treatment for Neuroendocrine Tumour.
Karwaan is a movie written by a Malayalam writer which consists of an ensembled cast from Mollywood (Dulquer), Bollywood (Irrfan), Marathi industry (Mithila), Tollywood ( Amala Akkineni) and Sandalwood (Kirti).
Movie is shot at Tamil Nadu's Nilgiri Hills, Ooty.