The next presidential elections will be held on June 12, 2009, the Iranian interior ministry announced Sunday.
So far only the nomination of President Mahmoud Ahmadinejad and the head of the opposition party Etemad Melli (National Trust), Mehdi Karroubi, have been confirmed.
Analysts speculate that parliament speaker Ali Larijani and Tehran mayor Mohammad-Bagher Ghalibaf from the neo-conservative wing, and former president Mohammad Khatami from the reformist faction could also challenge Ahmadinejad.

Shares fell 2.1 per cent Friday on the Seoul stock exchange on general recession fears. South Korea's won dropped against the dollar.
When the Spirit rover landed on Mars five years ago, no one expected it or its sister rover Opportunity to make it to their first birthdays, let alone their fifth.
Amelie Mauresmo fell victim to a leg injury after less than half an hour on court Friday to hand over a 4-0 victory which put French compatriot Marion Bartoli into the final of the Brisbane International.
Mumbai-based movie Slumdog Millionaire won five prizes Thursday night at the Critics Choice Awards, cementing its position as a surprise favourite just as the Oscar season moves into high gear.
After the Taipei Zoo received two giant pandas from China, another Taiwan zoo said Friday it is seeking to receive a pair of pandas from China.