Ranveer Singh as Bajirao I Deepika Padukone as Mastani Priyanka Chopra as Kashibai Tanvi Azmi as Radhabai Milind Soman as Ambaji Pant Vaibhav Tatwawaadi as Chimaji Appa Ayush Tandon as Nana Saheb Rudra Soni as Young Nana Saheb Mahesh Manjrekar as Chhatrapati Shahu Aditya Pancholi as Shripad Rao Raza Murad as Qamar ud-Din Khan Sukhada Khandkekar as Anubai Benjamin Gilani as King Chhatrasal Anuja Sathe as Bhiubai Yatin Karyekar as Krishna Bhatt Ganesh Yadav as Malhar Rao Snehlata Girish Vasaikar as Bhanu Mousumi Saha as Bhavana Rao Irrfan Khan as the narrator (voice-over)

Answer this question based on the passage: who is nana saheb in bajirao mastani movie? Let's have some stream of consciousness first.
To answer the above question, the relevant sentence is: Ayush Tandon as Nana Saheb So, the answer is Ayush Tandon.