The filmmaker told a leading daily, “The story needed Shah Rukh Khan and that’s why he is there. It’s not that ‘now let me work with Shah Rukh Khan’, that was not the decision. I needed somebody as strong as him to come onboard because you need to be a very self-assured actor to play this role. To let go those two feet is not easy. But then you have to be very sure about yourself and Shah Rukh Khan is very sure about himself.” While talking about the storyline of the film, Aanand revealed, “I will give you a lot of fun. Again, I will give you a lot of emotion. I will give you a lot of happiness and it’s an extension of what I have done before, but this time I have made it more challenging.” The film will cast Katrina Kaif & Anushka Sharma. 'Zero' will have the surprise cameos of Alia Bhatt, Karisma Kapoor, Sridevi, Madhuri Dixit & Salman Khan. The film will hit screens on 21st December. Shah Rukh Khan is leaving no stone unturned to make this movie larger than life. If trade pundits to be believed then VFX of this movie will be of another level.