Former cricketer Imran Khan sworn-in as Pakistan's prime minister

Cricketer-turned-politician Imran Khan (L) takes the oath of the Prime Minister from President Mamnoon Hussain at the Presid House in Islamabad, Pakistan August 18, 2018. Press Information Department(PID) Handout via REUTERS

ISLAMABAD (Reuters) - Former cricket star Imran Khan was sworn-in as prime minister of Pakistan on Saturday, taking on the challenge of forming a coalition to govern as a currency crisis looms over the turbulent, nuclear-armed South Asian country.

Khan, a firebrand nationalist, won the general election last month promising to fight corruption and drastically reduce poverty among Pakistan's 208 million mostly-Muslim people.