Iran's president-elect Masoud Pezeshkian will be inaugurated on Tuesday (July 30), Reuters reports.
A ceremony will be held on Sunday (July 28) to present the decree for his presidency, with Supreme Leader Ayatollah Ali Khamenei expected to attend.
Pezeshkian, a 69-year-old heart surgeon, has pledged to promote a pragmatic foreign policy, ease tensions over now-stalled negotiations with major powers to revive a 2015 nuclear pact and improve prospects for social liberalisation and political pluralism.
However many Iranians are sceptical about his ability to fulfil his campaign promises as Khamenei, not the president, is the ultimate authority in the Islamic Republic.
Pezeshkian defeated hardline Saeed Jalili in a second-round presidential vote.
The late president Ebrahim Raisi was killed in a helicopter crash near the Azerbaijan border in May along with his foreign minister and seven others.