Salman Khan's upcoming movie "Sultan" will present the superstar in the role of a wrestler and the leading actress in the film will also don the shoes of a wrestler, but reportedly with some negative shades.

Although, the leading lady of the film has not been confirmed, reports suggest that Salman's heroine in "Sultan" will have a grey character.

"The female lead is a negative character- very very challenging. But it won't be an out and out negative character for sure," DNA quoted a source as saying.

There have been many speculations regarding the female cast of "Sultan" as names of actresses like Parineeti Chopra, Deepika Padukone and Anushka Sharma popped up. But, nothing has been confirmed as yet.

It is being supposed that the makers of "Sultan" are finding it hard to finalise the film's heroine as the actress has to fit into the role of a wrestler.

Meanwhile, Salman has been training hard for his role as he earlier said that he will be seen in double his size in the movie and thus has been undergoing rigorous training.

Makers of the film have reportedly started shooting for the first schedule of the film, without the leading lady.

Directed by Ali Abbas Zafar, "Sultan" is slated to be released on Eid next year.