Directed by Sriram Raghavan, Twenty One marks the last screen appearance of late veteran actor Dharmendra. Amitabh Bachchan’s grandson Agastya Nanda has entered the silver screen with this film. Apart from Agastya Nanda and Dharmendra, the film also stars Jaideep Ahlawat, Simar Bhatia, Sikander Kher and Vivaan Shah.