Indian skipper Mahendra Singh Dhoni says he was surprised to see actor Sushant Singh Rajput portray his walk, his talk and every minute details of his personality with perfection. Sushant is playing Dhoni in the upcoming biopic "M S Dhoni: The Untold Story".

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The 30-year-old actor had to emote the 'captain cool' (as Dhoni is fondly called) by understanding his mindset when his team won or lost a match. "Also the way I walk, the way I talk, he has copied almost everything.

The "Shuddh Desi Romance" actor in order to get into the skin of the cricketer, had to undergo rigorous training to perfect his cricketing skills, specially to pull off Dhoni's trademark 'helicopter' shot well on screen.

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"He (Sushant) has worked very hard. He was practicing everyday for more than nine months. He was batting everyday for over three hours when it comes to portraying the (cricket) shots," Dhoni said in a statement here. The film is scheduled for September 30 release.