Actors Mithun Chakraborty, Sanjay Dutt, Jackie Shroff and Sunny Deol are all set to star together in an action entertainer, titled 'Baap'. Sharing a picture from the set on his Instagram handle, Sanjay wrote, "Jackie, Mithun, first day of shoot and Sunny already bunking...where are you paaji?" The upcoming film is reportedly being directed by Vivek Chauhan.