However, that didn't deter the confident actress from flashing a million dollar smile.
She wore a black dress with a neckline plunging enough to give a clear view of a 22 carat gold choker in an antique finish.
The "Rockstar" actress had already done her catwalk before the 'oops' moment happened.
After the show, Nargis told reporters she just laughed off the incident.
"Nothing happened. Someone just stepped on my dress and I started laughing. I laugh a lot when I am nervous," she said.
A Bevy of Bollywood actors set the mercury soaring as showstoppers for different designers at an ongoing bridal fashion week in New Delhi.