Randeep Hooda seems to have taken his role in 'Sarbjit' a tad too seriously. The talented actor is known to immerse himself in whatever character he portrays in his films.

Randeep is portraying the role of the prisoner in the biopic. He feels this is, by far, the most challenging and difficult role in his career. So, in order to get into character, he has been spending time in solitude and keeping away from events.

Recently, he landed up on the sets in his dishevelled prisoner's garb leaving onlookers perplexed. The security guards, too, failed to recognise him. On the set, he keeps to himself and limits his interactions with others.