Akshay turned down BMB

Yes, so we've heard. It seems that not only did Milkha Singh want Akshay Kumar to portray him in the film but director Rakeysh OmPrakash Mehra was also keen that Kumar play the title role. Unfortunately, things didn't work out. Now that the film has made it to the 100-crore club, sources say that Akki wishes he had done the film.

source: http://www.filmfare.com/news/akshay-turned-down-bhaag-milkha-bhaag-4054.html

He might even win a national award for this performance

its not Akki kinda role