Underdog India outclassed mighty West Indies by 43 runs in the final played at the Lord's on June 25, 1983 to lift their maiden World Cup under Dev's leadership.
"Audience knows he is Ranveer and he is going to play the role of Kapil Dev in the film. Today, there is technology to make Ranveer look exactly like him, but that is not the attempt.
He said Ranveer has already begun preparations for his role in the film.
"It is a simple brief to Ranveer. He just has to see Kapil Dev playing the game. The iconic body language of Kapil Dev, the way he used to bowl, bat. He (Dev) is monitoring it (training)," he added.
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Kabir said the members of the 1983 World Cup team are set to supervise and coach the rest of the actors.
The team members such as Roger Binny, K Srikkanth, Madan Lal, Yashpal Sharma, Balwinder Singh Sandhu and Sandeep Patil had narrated some anecdotes dating back to the historic day.
Kabir added he would not need to take "cinematic liberities" during the filming as, "there is lot of material, we have hours and hours of sessions with the cricketers (the players), so it is a gold mine of material."
The "Bajrangi Bhaijaan" helmer said the team would be majorly shot in London and they have the support of cricket authorities like the ICC and BCCI.
"The whole cricket community from all over the world, whether it is the ICC or BCCI is helping. It is such a celebratory story about cricket that any cricketing body would like to support it," Kabir said.
The makers are yet to rope in actors who would essay the role of other team members.
Casting director Mukesh Chhabra is currently busy scouting for talent.
"There is no leading lady as such in the normal way that we look at Indian cinema. It is a true story about a team, so obviously their wives will be there, they are central characters," he said.
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