Akshaye Khanna has been roped in to play Sanjaya Baru, Singh's media adviser.
Talking about his character, Khanna told a news portal, "My role in the movie is outstanding and the screenplay divine. I am thrilled and excited to be a part of a venture which will be pathbreaker."
Also, German actress Suzanne Bernett will be portraying former Congress President Sonia Gandhi.
A massive starcast
The biopic will feature over 140 actors
Apart from Khanna and Bernett, 'The Accidental Prime Minister' will have actor Arjun Mathur essaying Congress President Rahul Gandhi. Arjun has previously worked in films like 'My Name Is Khan' and 'Luck By Chance'.
The movie has been raising eyebrows as it will be hitting the screens on 21 December, just months before the 2019 general elections.