Bollywood star Shah Rukh Khan has been speaking about his latest film ahead of its worldwide release, saying it is "extremely funny".The much-anticipated Chennai Express is an action-comedy film, in which Khan stars as Raul, a man who finds love on a road trip to Rameshwaram.He and his co-star Deepika Padukone spoke to the BBC's Shabnam Mahmood about the film, cricket and the role of women in film.