Khan, who faced his toughest political test since assuming office in 2018 due to defections in his party and cracks in the ruling coalition, in a surprise announcement during an address to the nation on Sunday said he had advised the president to 'dissolve assemblies'.
While in power, Khan repeatedly talked about making Pakistan an Islamic welfare state. However, he failed to fix the economy and the basic problem of keeping the prices of commodities in control.
Khan's spokesman in a statement said that he had proposed marriage to Bushra Maneka, who has "asked for time to make a final decision after consulting her family, including her children".
Khan got closer to Bushra Bibi when he started visiting her over a year ago to seek spiritual advice.
Khan, who is believed to have the backing of the powerful military, has vowed to make a 'Naya Pakistan' which would be an Islamic welfare state.