Iranian Foreign Minister Mohammad Javad Zarif and three of his deputies will attend multilateral talks on Friday in Vienna that seek to resolve the conflict in Syria, the foreign ministry was quoted as saying on Wednesday.
It will be the first time that Tehran, the main regional backer of Syrian President Bashar al-Assad, attends an international summit on the four-year-long war. Other participants, notably the United States, say Assad can play no part in Syria's future.
"Deputy Foreign Ministers Hossein Amir Abdollahian, Abbas Araqchi and Majid Takht Ravanchi will accompany Zarif on this trip," foreign ministry spokeswoman Marzieh Afkham was quoted as saying by Iran's ISNA news agency.
Egypt, Iraq, Lebanon, the European Union and France also said they would attend Friday's talks, which come a week after a smaller round of negotiations between the United States, Russia, Saudi Arabia and Turkey.