Some of the candidates being painted on a wall in Cairo
Egyptians are going to the polls in the first "free and fair" presidential election in the nation's history, 15 months after Hosni Mubarak was ousted from power.
The vote - taking place in two phases - is seen as a landmark moment in the country's turbulent transition to democracy, paving the way for the ruling military to hand over control to a civilian leader by the end of June, reports Sky News.
The voters are choosing between 11 candidates amid ongoing divisions over whether to opt for secular or Islamist rule.
The novelty of democracy has excited Egyptians who were previously detached from the political process.
The presidential candidates have been touring the country and debating live on television.
Their campaign posters are plastered across Cairo, where Egyptians chat about politics and policies in the streets and online.
For those who favour an Islamist president, there are two main frontrunners: Dr Mohamed Morsi is the official candidate of the Muslim Brotherhood , the movement which has emerged as the dominant political force in Egypt since the revolution.
But even some of the voters who favour Islamist rule are wary of the Muslim Brotherhood's increasing power in the country - it already controls the parliament.
His main rival is the independent "liberal" Islamist Abdel Moneim Aboul Fatouh, who is seen as offering a more moderate brand of religious leadership and has won broad support.
The leading secular candidate is Amr Moussa , who is well-known internationally, as the former head of the Arab League.
The 75-year-old also served as foreign minister under Hosni Mubarak in the 1990s but has tried to distance himself from the old regime.
He is presenting himself as the most experienced candidate and a "safe pair of hands".
The most controversial candidate - another frontrunner - is Ahmed Shafik, who was prime minister at the time of the revolution.
He was a former air force commander and favours a strong, continuing role for the military.
He appeals to those Egyptians who have been unsettled by the revolution, particularly the supporters of the old regime.
The first round of voting takes place on Wednesday and Thursday, and then a run-off vote will be held in mid-June.
Many Egyptians have been impatient to be rid of the military rulers, who have controlled the country since the uprising.
Anger over the military's ongoing influence has triggered violence and unrest , amid fears that the generals are trying to hold onto power.