Newly elected members of Pakistan's 14th National Assembly have taken oath, officially marking the first transition of power between democratically elected governments in the 66-year history of the country.
The incoming lawmakers arrived at the parliament building in Islamabad under tight security on Saturday.
Outgoing Speaker Fehmida Mirza administered the oath to them.
Saturday's session comes weeks after the Pakistan Muslim League(N) party of Nawaz Sharif won 176 seats in the 342-member lower house of Parliament.
The previous ruling Pakistan People's Party suffered a heavy loss in the elections, earning just 39 seats.
Sharif, who is expected to be the next prime minister, and his party face numerous challenges, including massive energy shortages, a badly ailing economy and ongoing militancy.