Raju Srivastava is on a ventilator in the AIIMS' ICU after suffering a heart attack.
The 'comedy king' was born in Uttar Pradesh's Kanpur on December 25, 1963.
Raja drew inspiration from poet father Balai Kaka to become a comedian since childhood.
He is best known as an Amitabh Bachchan look-alike.
He ventured into stand-up comedy with the lalent-hunt show The Great Indian Laughter Challenge.
Raju also gained fame after he participated in Bigg Boss Season 3.
Raju also worked for a short time on Comedy Nights with Kapil.
He is also active in politics and associated with the BJP since 2014.