Dignitaries from 52 countries will attend Hassan Rouhani's inauguration, spokesman of Iranian foreign ministry, Abbas Araqchi said, IRNA reported.
"Eleven presidents, eight vice-presidents, two prime ministers, three deputy prime ministers, seven parliament speakers and 11 foreign ministers will represent their governments at the upcoming inauguration," Araqchi said.
The spokesman noted that composition of delegations from 12 countries have not been specified yet.
The Foreign Ministry spokesman said that although officials from some other countries are willing to attend the ceremony, Iran cannot accept more participants due to the limited space of the parliament hall.
IRNA reported earlier that former EU foreign policy and security chief Javier Solana will attend the ceremony as well.
The special guests will be Malaysian ex-premier Mahathir Mohamed and Representative of United Nations Secretary-General Ban Ki-moon to Afghanistan, Jan Kubis.
Rouhani won the June 14 presidential elections in Iran, gathering over 50 percent of votes, securing his place as the next president of Iran.
Heads of several countries in the region and the world welcomed Rouhani's victory. The inauguration ceremony will be held in the Iranian parliament on August 4.
For the first time since the Islamic revolution, the inauguration ceremony will be attended by senior representatives of different countries, including the presidents of several countries.