Mary Kom director Omung Kumar, who is making a biopic on Sarabjit Singh, says he wants a bold actress to play the role of the slain Indian prisoner?s sister Dalbir Kaur. Names of actresses like Sonakshi Sinha, Kangana Ranuat, Deepika Padukone, Priyanka Chopra have cropped up in media for the role of Dalbir.