"Soorma" and Dutt biopic are scheduled to be released on June 29.
"The film is based on my favourite superstar Sanjay Dutt sir and my favourite actor Ranbir is playing his role and it is directed by my favourite director (Rajkumar Hirani).
"All my favourite people are in a one film so I am very excited to see it. I will definitely go and watch the film," Diljit told PTI.
Diljit, who will be seen as former Indian hockey captain Sandeep Singh in "Soorma", said it was a difficult film to make.
"I have not played any games so far. I feel hockey is a tough game. I am very happy that in the second year of my acting career in Bollywood I got to do a biopic. We all have worked really hard."
The "Udta Punjab" actor says despite the doctors giving up and losing all hope, the hockey player bounced back.
According to Diljit, the makers of "Soorma" have tried their best to present an authentic story of Singh on screen.
The actor-singer was trained for almost two months by Singh, who used to be present on the sets most of the time.
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