Actress Rani Mukerji will play the role of a cop in 'Mardaani', her first release post marriage to Aditya Chopra.

The Yash Raj Film, out on August 22, is directed by Pradeep Sarkar, who last helmed Rani in 2007 film 'Laaga Chunari Mein Daag'. Rani plays Shivani Shivaji Roy, an astute cop working in a Mumbai Crime Branch unit, who stumbles into the kidnapping case of a teenage girl.

Shivani embarks on an obsessive hunt for the girl and what follows is a cat and mouse game between a fearless cop and a ruthless mafia kingpin. Rani will play the role of a cop for the first time in her career in the movie, which is also a distinct departure for Sarkar, erstwhile known for his films like 'Parineeta' and 'Lafangey Parindey'.