Bollywood actress Preity Zinta has described her next film directed by Yash Chopra "an epic", saying it will be unlike anything ever seen on the Indian silver screen.

"It is a unique, wonderful, and completely out of the ordinary film," says Zinta on the sidelines of a news conference to announce her as the new brand ambassador for Head & Shoulders anti-dandruff shampoo in India.

The yet untitled film also stars Shah Rukh Khan and Rani Mukherjee.

"It will herald a change in Bollywood, I think, we haven't seen such a good film, about good things for sometime," Zinta said about the film due for release in November.

Her other big film "Dil Ne Jise Apna Kaha" opposite Salman Khan releases in September.

"This film is sweet and innocent, completely uncorrupted," smiled Zinta, showing off her trademark dimples, wearing a white-brown sleeveless, fitting blouse and an orange skirt.

Asked about the new trend of skin flicks in Bollywood and whether she would do them, Zinta said she wouldn't dare-bare on screen.

"I think it's probably best left to the Censor Board to decide what can and cannot be shown on screen. But the censors are also sometimes strange - all sorts of things are shown on television but a little thing in the movies causes a ruckus," said the bubbly actress.

"You show domestic violence all the time and then someone comes and says showing smoking scenes is bad. So it's a little confusing."

Her favourite hairstyle, she said, was the curly shoulder-length locks she sported in "Dil Chahta Hai".

As brand ambassador for Head & Shoulders, the world's largest selling anti-dandruff shampoo, Zinta joins the company of stars like Friend's actress Courtney Cox and Hollywood diva Salma Hayek.

"I chose to be brand ambassador because I believe I have my head on my shoulders," said Zinta.

The $1 billion brand sells in 100 countries and around 1,000 people use Head & Shoulders every second. In India, Head & Shoulders is the biggest anti-dandruff brand with 46 percent market share.