Rana Daggubati is a well known actor in Bollywood long before Baahubali as he did Dum Maaro Dum with Abhishek Bachchan and Bipasha. He also acted in Baby with Akshay Kumar and made a cameo in Yeh Jawani Hain Deewani.
He did a movie called Department with Amitabh Bachchan in the direction of Ram Gopal Verma. Baahubali movies have given him more exposure and made him a known actor in Northern states too.
For a cameo using his Bhallala Dev name, Housefull 4 director, Farhad Sajjad asked him it seems. The young actor did agree for the relationship he has with Akshay and producer Sajid Nadiadwala, it seems.
Sajid Khan dropped out of the project as writer and director after some scathing allegations are made about his behaviour with women and sexual abuse. Movie will release in Summer of 2019.
