Fatima Sana Shaikh and Sanya Malhotra have joined the cast of 'Sam Bahadur', a biopic on Field Marshal Sam Manekshaw. Vicky Kaushal, who'll play the titular role in the film, shared the news on the occasion of director Meghna Gulzar's birthday. While Sanya will essay the role of Sam Manekshaw's wife Silloo, Fatima will portray former Prime Minister Indira Gandhi.