Jagdish Mukhi was on Saturday sworn-in as the Governor of Mizoram at a simple function at the Raj Bhavan in Aizawl.
Gauhati High Court judge, Justice Nelson Sailo administered the oath of office to Jagdish Mukhi.
Mr Mukhi is also the Governor of Assam.
He succeeded Kummanam Rajasekharan as the governor of Mizoram as the latter resigned on Thursday and his resignation was accepted by the President Ram Nath Kovind who appointed Mukhi to take additional charge of Mizoram.
After taking charge of Mizoram Governor, Jagdish Mukhi said he would administer the oath of office to C Lalsawta as chairman of the first Lokayukta on Monday at Aizawl Raj Bhavan.
Mr Lalsawta, a retired IAS officer was recently appointed as chairman of the newly-constituted Lokayukta in Mizoram on February 28.