The former Andhra Pradesh Assembly Speaker N Kiran Kumar Reddy was today sworn-in as the 16th Chief Minister of the state. Governor E S L Narasimhan administered the oath of office and secrecy to 50-year-old Kiran Kumar Reddy. He was chosen late last night as the leader of Congress Legislature Party in place of K. Rosaiah who resigned from the Chief Minister's post yesterday.Union Ministers and party observers M Veerappa Moily, hulam Nabi Azad, outgoing Chief Minister Rosaiah and a host of Congress leaders, MLAs and MLCs attended the brief swearing-in ceremony. Only Kiran Kumar, a four-time MLA, took oath today and the Council of Ministers is expected to be reconstituted after he holds consultations with the Congress high command.The new Chief Minister is expected to leave for New Delhi later in the day to call on AICC president Sonia Gandhi and other top leaders. Earlier in the day, former ministers, MPs, MLAs, MLCs and several Congress leaders met Kiran Kumar at his Banjara Hills residence and congratulated him. State Chief Secretary S V Prasad and Director General of Police K Aravinda Rao led the bureaucrats in greeting the new Chief Minister.K. Rosaiah, 77, had resigned yesterday in a surprise move in the midst of dissidence within the party and attacks on Sonia Gandhi and the Congress by media outlets owned by late chief minister Y S R Reddy's son Jaganmohan. The move is also being seen as Congress' political management ahead of the submission of the Srikrishna panel report on the issue of Telangana by December 31. Rosaiah, the stop-gap Chief Minister who took over in the aftermath of YSR's death in September last year, had resigned citing personal reasons. Kiran Reddy, who hails from Rayalaseema region, was elected from Pileru constituency in Chittoor district.