Directed by Omung Kumar, 'Sarbjit' is based on the real-life story of Sarabjit Singh, who was convicted for spying and terrorism and languished in a Pakistani jail for 23 years, while his sister Dalbir Kaur, tried vigorously to release him.
The 73-year-old has called the film intense and dramatic.
"'Sarabjit' an intense dramatic film... Pertinent and performed with great aplomb! Congratulations!" Amitabh tweeted.
The film's director Omung Kumar re-tweeted Big B's comment and thanked him for making it to the movie's premiere.
"Thank you so much, sir and thank you for coming for the premiere," Kumar tweeted.
Randeep Hooda has essayed the role of Sarabjit Singh in the film.
The film is narrated through the perspective of Sarabjit's sister Dalbir Kaur, played by Aishwarya.
Big B's 'Sharaabi' clocks 32 years
Amitabh Bachchan-starrer 'Sharaabi' completed 32 years of its release in Hindi cinema on Wednesday, and he can only look back at the "amazing times" with joy.
The drama film revolves around a spoilt but kind-hearted son of an extremely rich and uncaring father who heads down the path of alcoholism and depression.
"And 32 years of my film 'Sharaabi'. Amazing moments and times! Abhishek on set," Big B tweeted.
Directed by Prakash Mehra, "Sharaabi" features Jaya Prada, Pran, Om Prakash, Bharat Bhushan and Ranjeet.
The film was Mehra's sixth film in a row with Amitabh and was loosely based on Steve Gordon's 1981 film Arthur starring Dudley Moore.