Well, why Kattappa killed Baahubali? might be the nation's biggest secret but actor Rana Daggubati has revealed that the answer is no secret on the sets of Baahubali. "Everyone on our film set knows, SS Rajamouli was very clear from the beginning, every single actor who has worked on this film, right from the smallest to the biggest will know the entire story of Baahubali very clearly. The two parts were narrated to us, five years ago. So it was a not quick creation that came out of nowhere. It was planned, thought of and executed," Rana was quoted saying to a leading English daily.