Bollywood actor Akshay Kumar, who has performed innumerable death-defying stunts in his nearly two decade old films career, says his upcoming underwater thriller "Blue" is his "most dangerous" film ever.

"This experience has pushed just about everyone involved to their absolute limits - from the producer's bank balance, to the director's maximum efforts for his first baby, which just happens to be the most dangerous movie I've ever been a part of, " Akshay posted on his blog akshay.bigadda.com.

"Blue", which is about an underwater treasure hunt, has been directed by debutant Anthony D'Souza. Releasing Friday, it also features Sanjay Dutt, Zayed Khan, Lara Dutta, Katrina Kaif along with Australian pop princess Kylie Minogue in a cameo.

The movie is being touted as the most expensive ever in the film with industry insiders claiming that producer producer Shree Ashtavinayak Cine Vision Ltd has splurged Rs.80 crore on its making.

D'Souza brought down Hollywood's renowned underwater cinematography specialist Pete Zuccarini, who shot for "Pirates of the Caribbean" series, to shoot underwater scenes. James Bomalick of "Indiana Jones" fame was also engaged to choreograph the action sequences in the movie.

Shooting with such world-renowned experts has been one memorable experience for Akshay.

"What I loved shooting about this film other than the extreme stunts, the pressure and hardcore diving sessions with all those hungry sharks around, was the fact that I got to work with the most talented team I've ever come across.

"Pete Zuccarini is a person I'll never forget. He taught me not only to look like a fish but act, swim and feel like I belonged underwater and that's why I pushed myself to my limit in this film, " posted Akshay.

The 42-year-old further wrote that the crew's dedication motivated him to "attempt" at being a human dolphin for them.

"I trained myself to be able to handle whatever these guys could throw at me. When there is an entire crew waiting for you to nail a shot, you do not want to go wrong. I respected their time and effort and they respected my attempt at being a human dolphin for them, " he added.

Now, after his critically panned movies like "Chandni Chowk To China", "8X10 Tasveer" and "Kambakkht Ishq", Akshay is hoping that "Blue" gets appreciated.

"If this movie gets appreciated half as much as it deserves, I'd be a very happy man. It has created a new Bollywood dimension and no matter what the outcome may be, I take my hat off to everyone who made this movie, " said Akshay.