Sir Michael is to wed Esmie Ereoli from the Solomon Islands. Ms Ereoli, a former employee of Pacific Casino Hotel, was said to have met Sir Michael in 2009 when he was a cabinet minister. The couple have maintained a very private relationship to this day.
The Governor General's official secretary, Tipo Vuatha, in an interview with Radio Australia, said that the wedding will be the first of its kind in PNG staged in public.
"We cannot make it a private one," he said.
"All the previous Governor Generals came with their spouses. He was a widower."
The PNG government will pay for the public wedding, said Mr Vuatha, which will be held at St Mary's Cathedral in Port Moresby followed by a state function in parliament.
Mr Vuatha said that the wedding will take place next Saturday.
Sir Michael Ogio GCMG, CBE was born on 7 July 1942 was leader of the People's Democratic Movement Party.
He became acting as governor-general in December 2010 when Jeffrey Nape resigned after one week without explanation. He was elected as Governor-General in his own right on 14 January 2011 when he defeated Pato Kakeraya 65-23.
He was knighted by Queen Elizabeth II on 26 April.
Source: Solomon Times, 17 October
Spotter: Martin Hadlow