Imran Khan sworn in as Pakistan's new Prime Minister

Imran Khan was sworn in as Pakistan's new prime minister today, nearly 22 years after the former cricket hero entered politics.

Khan, 65, the chairman of the Pakistan Tehreek-e-Insaf (PTI), was administered the oath of office by President Mamnoon Hussain at a simple ceremony held at the Aiwan-e-Sadr (the President House) in Islamabad.

The ceremony commenced with the national anthem, followed by recitation of verses from the Holy Quran.

Clad in a black sherwani, Khan was seen little nervous as he faced difficulties in pronouncing some Urdu words during the oath.

Khan, who famously captained the national cricket team to World Cup glory in 1992, has also invited some of his former teammates to witness his formal ascension to the top ministerial job in the country.

Army Chief Gen Qamar Javed Bajwa, former Indian cricketer Navjot Singh Sidhu, cricketer-turned-commentator Rameez Raja, former paceman Wasim Akram were among the special guests present at the ceremony.

Khan's third wife Bushra Maneka was also present at the event.

The Oxford-educated Pasthun yesterday defeated his only rival and Pakistan Muslim League-Nawaz chief Shahbaz Sharif in a one-sided election for the top post in the National Assembly.

Khan secured 176 votes while Sharif got 96 votes. A total of 172 votes in the 342-member lower house of parliament are needed to form a government.

In his first address to parliament, Khan had vowed to act against those who looted Pakistan.

"I promise my nation today that we will bring the tabdeeli (change) that this nation was starving for," Khan said yesterday after winning the election.

"We have to hold strict accountability in this country; the people who looted this country, I promise that I will work against them," he vowed.

"The money that was laundered, I will bring it back - the money that should have gone towards health, education, and water, went into people's pockets," Khan said.

Khan, who described Pakistan's founder Mohammad Ali Jinnah as his hero, has promised to transform corruption affected Pakistan into an Islamic Welfare state.

He has the support of smaller parties including Muttahida Quami Movement with seven seats, Balochistan Awami Party five, Balochistan National Party four, Pakistan Muslim League three, Grand Democratic Alliance three, Awami Muslim League and Jamori Watan Party one seat each.

The PTI emerged as the single largest party with 116 seats in July 25 elections. Its number increased to 125 after nine independent members joined it and final tally reached 158 after it was allotted 28 out of 60 seats reserved for women and five out of 10 seats reserved for minorities.

Khan's government will be the third consecutive democratic government in Pakistan since 2008 when military ruler Gen Pervez Musharraf announced elections after serving as president from 2001 to 2008 following a bloodless coup in 1999.

The PPP formed the government in 2008, followed by the PML-N led by jailed former prime minister Nawaz Sharif in 2013.

Pakistan's powerful military has ruled the country through various coups for nearly half of the country's history since independence in 1947.