Iran's Election Fever
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Vetters disqualified the presidential bids of 471 people, leaving four men to battle it out in the popular vote.
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Supreme Leader Ayatollah Ali Khamenei offered his early endorsement to conservative incumbent Mahmud Ahmadinejad.
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The three-week campaign season kicked off in earnest once the field was narrowed to four.
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TV debates were a first in Iran presidential politics, with each candidate going one-on-one against each of his rivals.
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Sparks flew during reformist Mir Hossein Musavi's debate with Ahmadinejad on June 3, the presumed front-runners.
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Cleric and reformist candidate Mehdi Karrubi was among a handful of candidates defeated by Ahmadinejad in 2005.
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An underdog, former Revolutionary Guards commander Mohsen Rezai brandished conservative credentials.
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Musavi supporters donned green, while Ahmadinejad voters frequently brandished the national flag.
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Ahmadinejad and Musavi backers confronted each other outside Tehran University after Friday prayers on June 6.
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Musavi supporters hit Tehran's streets on June 8, when they formed an 18-kilometer human chain on Valiasr Avenue.
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An Ahmadinejad supporter in Tehran on June 2
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President Ahmadinejad and his wife at a campaign rally in Tehran on June 2
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Musavi's wife, artist and former university chancellor Zahra Rahnavard, campaigned tirelessly for her husband.
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Musavi rallies drew tens of thousands to sports stadiums in major cities.
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Ahmadinejad supporters turned out at Sharif University on June 10.
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With passions high and no opposition boycott in effect, there was a party-like atmosphere at the height of the campaign.