Zoramthanga, 74, took office as the Chief Minister for the third time. Earlier he headed the state from 1998-2003 and 2003-2008.

Outgoing Chief Minister Lal Thanhawla, Meghalaya Chief Minister Conrad K. Sangma, Asom Gana Parishad (AGP) leader and former Assam Chief Minister Prafulla Kumar Mahanta, leaders of various political parties and senior civil and security officials were present in the ceremony.

"The Chief Minister would distribute the portfolios among the ministers soon after a cabinet meeting," an official of the Chief Minister's secretariat told the media.

The MNF in the November 28 Assembly polls secured 26 seats, five more than an absolute majority in the 40-member Assembly, ousting the Congress from power in its last bastion in northeast India.

The MNF had got only five seats in the 2013 Assembly polls, while the Congress had won 34. This time, the Congress got only five seats.

The Bharatiya Janata Party (BJP) for the first time made its entry into the Mizoram Assembly, winning the lone Tuichawng seat.

State Congress chief and outgoing Chief Minister Lal Thanhawla lost in both Champhai South and Serchhip constituencies. 

Zoramthanga won the Aizawl East-I seat for the fifth term.

The MNF is a constituent of the BJP-led North East Democratic Alliance (NEDA). 

However, both the BJP and MNF fielded candidates separately in 40 and 39 seats, respectively.