Geetanjali died on Saturday night after she suffered some uneasiness followed by chest pain.
He is probably the second personality after Prithviraj Kapoor to get the honour posthumously.
The National Awards film jury announced today that Sridevi the best actress for her role in 'Mom'.
Vinod Khanna is survived by his former wife Geetanjali and their sons Akshaye and Rahul, who are now actors, and his present wife Kavita and son Sakshi and daughter Shraddha.
Vinod Khanna was hospitalised since over a month for suspected cancer. He was 70 and is survived by his wife, three sons and a daughter.
Karan Johar has cancelled the film's premiere which was to take place on Thursday, as a mark of respect for Vinod Khanna, the veteran Bollywood actor-politician.
Vinod Khanna, sitting Bharatiya Janata Party MP from Gurdaspur, has been famous for his personality and exemplary work in movies like Achaanak, Qurbani, and Amar Akbar Anthony.
Vinod Khanna appeared in 141 films between 1968 and 2013 and also forayed into politics by joining the BJP. He was Minister of State for Tourism and Culture in 2002.