Actor Varun Dhawan will be shooting for one of the "toughest" scenes of his "entire career" for his upcoming film "Kalank".

A tweet from the official Twitter account of Dharma Productions read: "Shooting one of the toughest scenes of 'Kalank' and his entire career today is Varun Dhawan! He left no stone unturned for the prep. Wish him luck by leaving your wishes and love below."