Aam Aadmi Party (AAP) leader Manish Sisodia took charge as the deputy chief minister of Delhi here on Saturday.
Earlier in the day, party chief Arvind Kejriwal was administered the oath of office and secrecy by Delhi's Lt. Governor Najeeb Jung.
In an unprecedented first for the national capital, the Arvind Kejriwal-led Aam Aadmi Party won 67of the 70 seats on offer in the Delhi polls. With this extraordinary mandate, the AAP has become the first non-Congress and non-BJP party to rule the city.
The Congress which was in power in Delhi for 15 years failed to even open its account in the polls.
The BJP, which was relying heavily on Prime Minister Narendra Modi's popularity and had brought in former IPS officer Kiran Bedi as its chief ministerial candidate to counter Kejriwal, managed to secure just three seats.