Akshay, 48, who will be seen in a negative role in the reboot of the 2010 sci-fi film, said he felt like a child when he met Rajinikanth during the photoshoot of the movie.
"I always had this in my mind that whenever I would get a chance to star with Rajinikanth in a film, I would never let it go.
"Rajinikanth is a man with the golden heart. When I met him for the first time during the shoot, I was completely in awe of him. I was behaving like a child, who innocently looks at the candy jars in a shop. It was a wonderful experience," Akshay told PTI.
Directed by Shanmugam Shankar, "Robot" will star Amy Jackson in the female lead. A R Rahman and Resul Pookutty, both Oscar winners for "Slumdog Millionaire", will compose and sound design, respectively.
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The shooting of the film has already begun and the "Airlift" actor will start his leg of filming from March.
"I have seen almost all his films since my childhood. I am just waiting to start my shoot with him. I will start shooting in March."
As Akshay will be playing the antagonist after a long time, the actor says it's tough to play a negative character.