YS Jagan Mohan Reddy will be the third youngest Chief Minister of Andhra Pradesh. He is 46 years and six months young. Only two CMs were younger than him when they took over.
Chandrababu was younger than Jagan when he become a CM. He was 45 years and five months old when he backstabbed his father-in-law NTR to become CM. However, the youngest CM of the state was Damodaram Sanjeevaiah. He was just 38 years and 11 months young when he was made a CM. He had also headed the Congress Party. In fact, all the CMs had headed their parties at one time or the other. Chandrababu and Jagan are currently heads of their parties.
However, Jagan's father YSR was 54 when he became a CM.