Indo-Brazilian beauty Nathalia Kaur is all set to steal your breath away with her sizzling avatar as Cheeni in Ram Gopal Verma's Department. Apart from doing an item song, she is also starring opposite Rana Daggubati in the film.After Sunny Leone opted out, RGV signed Nathalia for the song Dan Dan."Many actresses I know shy away from doing item songs for fear of being typecast. But an item song for a girl is nothing but a moving portfolio. More than a still picture layout for a folio or magazine, an item song will give more details like her dancing and expressing abilities, etc. Only because I saw first hand how good Nathalia is in dancing and in her ability to emote in the item song, did I see her potential as an actress," the filmmaker said.The filmmaker is confident of his choice. "Apart from being a fantastic looker, the fact that she can also act so very well is what made me decide to do a feature film with her," he added. The item number has been choreographed by Ganesh Acharya.Sanjay Dutt and Amitabh Bachchan will play the protagonists in the film. Talking about the characters, RGV said: "The character Sarjeroa played by Mr Bachchan represents a Machiavellian character whose power lies in his manipulation and deception. The character Mahadev played by Sanjay Dutt represents an ultra dynamic character whose power lies in his dual personality which he very successfully hides. The character Shivnarayan played by Rana Daggubati represents a shoot first and talk later kind of a character, whose power lies in obedience to people whom he respects!" The film revolves around the terrifying power struggle within the police department. Department is scheduled to release on May 18.