Mumbai, Sept. 17 -- Arjun Kapoor has undergone a humongous transformation for Ashutosh Gowarikar's period drama- Panipat because in the film, which will see Arjun play the role of a warrior, Arjun Kapoor has been hitting the gym to get the body of a warrior. And today, this Ki & Ka actor took to social media to post a throwback photo wherein he is seen flexing his muscles while prepping up for the film. In the photo, where Arjun Kapoor is seen doing some heavy weight lifting while wearing a black ganji and a cap, and alongside the photo, the actor wrote, "Hustle for the Muscle !!! #panipat #throwbacktuesday #nopainnogain."

Well, we are sure that there is no gain without any pain and looking at Arjun's transformation, all we can say is th...