Sriram: A heroine's about more than glamour

"A heroine's role should not be just to add glamour. There should be a specific character. So I made sure that I get an A-level actress [for Agent Vinod] and Kareena was our choice," Raghavan said.

"Kareena has a mysterious character in the film and I definitely wanted a good actress for it. I love Kareena as an actress; so we just thought why not her," he added.

However, Raghavan was apprehensive about one thing regarding roping in Kapoor — she would be cast opposite her real life beau, Khan.

"The only worry was Saif and Kareena are a real life couple. So I didn't know if it will work or not. But I was convinced while making the film that they will justify the role," he said.

"It took three years to come up with this film. When we were writing the script, we let our imagination go wild. It's almost like I did two movies with Agent Vinod because my other movies have taken 50 days to get made, but this film has taken 100 days."

Raghavan is known for thrillers like Ek Hasina Thi and Johnny Gaddar. Now post-Agent Vinod, he plans to step out of his comfort zone and experiment with different genres.

"It's not that I only want to make thrillers. But I have been partial to thriller films. If somebody has a good script, I would love to make a love story or a children's film.

"I like every genre except for out-and-out comedy. I am not good at it. The other things I will attempt for sure."