The 34-year-old, who turned to acting with Ajnabee in 2001, walked the ramp for Shantanu-Nikhil and looked spectacular in a fitted long navy blue gown with a plunging neckline and long flowy sleeves.
She said: "I have been a model before and it was great to be here again."
"It's great to be back here in front of the fashion fraternity in pretty clothes. Fashion week is good because so many designers get to showcase their work. I had participated in the first fashion week as a model," Bipasha told media post show.
Recalling her modelling days, the actresses of films like Raaz, No Entry and Dhoom 2, said: "I always had this fear that my heels will break or come off. And my shoe did come off in one of the shows. But I walked down the ramp, slipped into my shoe and walked till the head ramp. Things happen when you are modelling... it's a tough life."
Bipasha liked Shantanu-Nikhil's collection and said: "The collection is fantastic. Mumbai boys will look even more dapper now."
Titled "The tourist", the clothes range was inspired by travellers keen to discover new destinations.
The looks were chic and stylish with light semi-formal jackets and fitted trousers for men, while formal skirts-tops, smart dresses and long flowy gowns were designed for women.
Adding to the look and feel of the evening was the set, which was transformed into an airport with regular flight announcements during the show.
"The collection is for urban travellers who work hard and part harder," the designer duo said.