In 2009, Prosenjit once again collaborated with Rituparno Ghosh for Shob Charitro Kalponik, which won the National Film Award for Best Feature Film in Bengali. In 2010, Prosenjit got another breakthrough by portraying the lead character of Arun Chatterjee in debutant Srijit Mukherji's Autograph, for which he was nominated at MIAAC (Mahindra Indo-American Arts Council) film festival, under the Best Actor category. He portrayed the role of Lalon, a noted spiritual leader, poet and folk singer of Bengal in the 19th century in Goutam Ghose directorial Moner Manush and Anthony Firingee in the National Film Awards winning film, Jaatishwar. He went to earn further recognition and wider appeal for his roles in the romantic thriller Khawto, the drama Praktan, the thriller Traffic, the drama Shankhachil, the crime film Zulfiqar and have committed to star in the Hindi films 3 Dev, alongside Kay Kay Menon, Raima Sen, Karan Singh Grover and Tabeer alongside Neeraj Kabi.