Mumbai: After a couple of intriguing posters and teasers, fans got to see the trailer of Shah Rukh Khan’s upcoming film Zero on his birthday. The Aanand L Rai directorial film starring Anushka Sharma and Katrina Kaif in lead roles along with SRK took fans down memory lane to the trio’s last film Jab Tak Hai Jaan.

However, the complicated love triangle between the three stars is quite different and unusual, not to mention SRK’s mind-boggling role as a dwarf that created a huge buzz online.

In the three-minute long trailer, audiences get to know the plot where SRK plays a 38-year-old Bauua Singh, a vertically challenged man, who is looking for a bride. Anushka plays Aafia, who is a wheelchair-bound woman suffering from cerebral palsy and Katrina Kaif’s character looks like she is playing a movie star.

He may be a superstar for his fans and critics alike but as per actor Shah Rukh Khan, there are moments in his life when he feels like a “loser”, something that only pushes him to work harder.

“I feel like a loser over everything. I was with Aamir Khan the other day. And he asked me ‘Why are you like this, Shah? Why do you think this way?’ I got to know after talking that he was also thinking the same way. He wasn’t asking me out of surprise, he wanted to know the answers for himself,” Shah Rukh said on Friday at the trailer launch of his upcoming film “Zero”.

The 53-year-old superstar believes it is “always important to have lack of overconfidence”.

“Overconfidence is worse than feeling like a loser. I feel I work harder when I think I am not good enough. I always feel I’m not good enough. I sometimes joke that I don’t know how to dance, I’ve five expressions but I genuinely believe them, that I’m not good at everything, so I’ve to work harder,” he said.

Shah Rukh plays the role of a vertically-challenged person in Aanand L Rai’s film, which is set to be released on 21 December.

He said when he was shooting for the film there were moments of doubts which he believes every creative person experiences.

“All of us had moments where we used to wonder if this is right, should we do this or not? There are so many issues actors and stars have, me the most. I’m insecure at times, overconfident at times, happy and extremely sad at times.

“I’m happy with what I’ve done and I am happier and even sadder what I shouldn’t have done and what has gone out of my hands, what is coming to my hands and all these things come together and make you feel loved when you do the right film.”