Y S Jaganmohan Reddy, who led his YSR Congress Party to a thumping victory in the assembly elections, was sworn in Thursday as chief minister of Andhra Pradesh.
Governor E S L Narasimhan administered the oath of office and secrecy to the 46-year-old leader, whose party emerged victorious in 151 seats in the 175-member strong state assembly.
The YSR Congress decimated the TDP headed by N Chandrababu Naidu, who became the first chief minister of the state after it was bifurcated to carve out Telangana five years ago.
The YSRC also won 22 of the 25 Lok Sabha seats in the state in the recently concluded polls.
Reddy took the oath in Telugu at 12.23 pm amid thunderous cheers by scores of party leaders and workers in a brief ceremony at the IGMC Stadium in Vijayawada.
Only Reddy took oath Thursday and his council of ministers is expected to be sworn in on June 7.
Telangana Chief Minister K Chandrasekhar Rao, DMK chief M K Stalin and Puducherry Health Minister Malladi Krishna Rao were the special guests.
Telangana Deputy Chief Minister Mahmood Ali, Assembly Speaker Pocharam Srinivasa Reddy, minister Talasani Srinivasa Yadav also attended the swearing-in ceremony.
Reddy's mother and YSRC honorary president Y S Vijayamma, his wife Bharati and sister Sharmila and other members of the family were specially seated on the dais.
Reddy reached the stadium and went round the galleries in an open-top jeep to greet thousands of people who came to witness the event.
Moreover, Congress president Rahul Gandhi on Thursday congratulated Y S Jaganmohan Reddy on being sworn in as chief minister of Andhra Pradesh.
"Congratulations to Jagan Reddyji on being sworn in as the CM of Andhra Pradesh. My best wishes to him, his new team of ministers and to all the people of the state," Gandhi tweeted.