VFX plays a very important role in every movie nowadays, and it played a major role in recent movie Fan as well. It helped in transforming Shah Rukh Khan from Aryan to Gaurav; double roles played by the Bollywood superstar King Khan.
Of course, it took Shahrukh 6 Hrs every day to put on makeup for the role of Gaurav, but just the makeup doesn't work. Visual effects (VFX) did all the remaining part.
Here, let's see how VFX turned 50 years old King Khan into 21-year-old Gaurav.