Now, after Kim Jong Un's absolute victory, the 12th Supreme People's Assembly (SPA) will serve a five-year term in accordance with the North Korean Constitution.
On Sunday, parliamentary elections started throughout the 'secretive' country in all 687 districts to choose members of the top legislature of the country. Voters had to write "Yes" or "No" on the ballot paper.
Kim Jong Un had registered at Constituency Number 111 as a candidate in the elections.
The results of other constituencies is yet to be declared.
It was the first election for the SPA under the leadership of Kim Jong Un, who took power in December 2011 following the death of his father Kim Jong Il.
The current deputies of the SPA, the highest organ of state power, were elected in March 2009.
The SPA has the power to adopt, amend or supplement enactments to the constitution, determine state policy and budgets, and adjust the country's leadership.
Meanwhile, a BBC report said that Kim Jong Un was accompanied by his younger sister, Kim Yo Jong, who is said to be 26 or 27 years-old.